TMUX

Token Ta Ta Meaning

{last} Ta ! Ta The last (previously active) pane

{next} Ta + Ta The next pane by number

{previous} Ta - Ta The previous pane by number

{top} Ta Ta The top pane

{bottom} Ta Ta The bottom pane

{left} Ta Ta The leftmost pane

{right} Ta Ta The rightmost pane

{top-left} Ta Ta The top-left pane

{top-right} Ta Ta The top-right pane

{bottom-left} Ta Ta The bottom-left pane

{bottom-right} Ta Ta The bottom-right pane

{up-of} Ta Ta The pane above the active pane

{down-of} Ta Ta The pane below the active pane

{left-of} Ta Ta The pane to the left of the active pane

{right-of} Ta Ta The pane to the right of the active pane

select-window -t:+2

In addition, target-session target-window or target-pane may consist entirely of the token `{mouse}' (alternative form `=' ) to specify the session, window or pane where the most recent mouse event occurred (see the Sx MOUSE SUPPORT section) or `{marked}' (alternative form `~' ) to specify the marked pane (see select-pane -m )

Sessions, window and panes are each numbered with a unique ID; session IDs are prefixed with a `$' , windows with a `@' , and panes with a `%' These are unique and are unchanged for the life of the session, window or pane in the tmux server. The pane ID is passed to the child process of the pane in the TMUX_PANE environment variable. IDs may be displayed using the `session_id' , `window_id' , or `pane_id' formats (see the Sx FORMATS section) and the display-message list-sessions list-windows or list-panes commands.

shell-command arguments are sh(1) commands. This may be a single argument passed to the shell, for example:

new-window 'vi /etc/passwd'

Will run:

/bin/sh -c 'vi /etc/passwd'

Additionally, the new-window new-session split-window respawn-window and respawn-pane commands allow shell-command to be given as multiple arguments and executed directly (without `sh' -c ) . This can avoid issues with shell quoting. For example:

$ tmux new-window vi /etc/passwd

Will run vi(1) directly without invoking the shell.

command [arguments ] refers to a tmux command, either passed with the command and arguments separately, for example:

bind-key F1 set-option status off

Or passed as a single string argument in .tmux.conf for example:

bind-key F1 { set-option status off }

Example tmux commands include:

refresh-client -t/dev/ttyp2

rename-session -tfirst newname

set-option -wt:0 monitor-activity on

new-window ; split-window -d

bind-key R source-file ~/.tmux.conf \; \
        display-message "source-file done"

Or from sh(1):

$ tmux kill-window -t :1

$ tmux new-window \; split-window -d

$ tmux new-session -d 'vi /etc/passwd' \; split-window -d \; attach

CLIENTS AND SESSIONS

The following commands are available to manage clients and sessions:

attach-session [-dErx ] [-c working-directory ] [-t target-session ]

If run from outside , create a new client in the current terminal and attach it to target-session If used from inside, switch the current client. If -d is specified, any other clients attached to the session are detached. If -x is given, send SIGHUP to the parent process of the client as well as detaching the client, typically causing it to exit. -r signifies the client is read-only (only keys bound to the detach-client or switch-client commands have any effect)

If no server is started, attach-session will attempt to start it; this will fail unless sessions are created in the configuration file.

The target-session rules for attach-session are slightly adjusted: if tmux needs to select the most recently used session, it will prefer the most recently used unattached session.

-c will set the session working directory (used for new windows) to working-directory

If -E is used, the update-environment option will not be applied.

detach-client [-aP ] [-E shell-command ] [-s target-session ] [-t target-client ]

Detach the current client if bound to a key, the client specified with -t or all clients currently attached to the session specified by -s The -a option kills all but the client given with -t If -P is given, send SIGHUP to the parent process of the client, typically causing it to exit. With -E run shell-command to replace the client.

has-session [-t target-session ]

Report an error and exit with 1 if the specified session does not exist. If it does exist, exit with 0.

kill-server

Kill the tmux server and clients and destroy all sessions.

kill-session [-aC ] [-t target-session ]

Destroy the given session, closing any windows linked to it and no other sessions, and detaching all clients attached to it. If -a is given, all sessions but the specified one is killed. The -C flag clears alerts (bell, activity, or silence) in all windows linked to the session.

list-clients [-F format ] [-t target-session ]

List all clients attached to the server. For the meaning of the -F flag, see the Sx FORMATS section. If target-session is specified, list only clients connected to that session.

list-commands [-F format ] [command ]

List the syntax of command or - if omitted - of all commands supported by .

list-sessions [-F format ]

List all sessions managed by the server. For the meaning of the -F flag, see the Sx FORMATS section.

lock-client [-t target-client ]

Lock target-client see the lock-server command.

lock-session [-t target-session ]

Lock all clients attached to target-session

new-session [-AdDEPX ] [-c start-directory ] [-F format ] [-n window-name ] [-s session-name ] [-t group-name ] [-x width ] [-y height ] [shell-command ]

Create a new session with name session-name

The new session is attached to the current terminal unless -d is given. window-name and shell-command are the name of and shell command to execute in the initial window. With -d the initial size comes from the global default-size option; -x and -y can be used to specify a different size. `-' uses the size of the current client if any. If -x or -y is given, the default-size option is set for the session.

If run from a terminal, any termios(4) special characters are saved and used for new windows in the new session.

The -A flag makes new-session behave like attach-session if session-name already exists; in this case, -D behaves like -d to attach-session and -X behaves like -x to attach-session

If -t is given, it specifies a session group Sessions in the same group share the same set of windows - new windows are linked to all sessions in the group and any windows closed removed from all sessions. The current and previous window and any session options remain independent and any session in a group may be killed without affecting the others. The group-name argument may be:

1. the name of an existing group, in which case the new session is added to that group;
2. the name of an existing session - the new session is added to the same group as that session, creating a new group if necessary;
3. the name for a new group containing only the new session.

-n and shell-command are invalid if -t is used.

The -P option prints information about the new session after it has been created. By default, it uses the format `#{session_name}:' but a different format may be specified with -F

If -E is used, the update-environment option will not be applied.

refresh-client [-cDlLRSU ] [-C XxY ] [-F flags ] [-t target-client ] [adjustment ]

Refresh the current client if bound to a key, or a single client if one is given with -t If -S is specified, only update the client's status line.

The -U -D -L -R and -c flags allow the visible portion of a window which is larger than the client to be changed. -U moves the visible part up by adjustment rows and -D down, -L left by adjustment columns and -R right. -c returns to tracking the cursor automatically. If adjustment is omitted, 1 is used. Note that the visible position is a property of the client not of the window, changing the current window in the attached session will reset it.

-C sets the width and height of a control client and -F sets a comma-separated list of flags. Currently the only flag available is `no-output' to disable receiving pane output.

-l requests the clipboard from the client using the xterm(1) escape sequence and stores it in a new paste buffer.

-L -R -U and -D move the visible portion of the window left, right, up or down by adjustment if the window is larger than the client. -c resets so that the position follows the cursor. See the window-size option.

rename-session [-t target-session ] new-name

Rename the session to new-name

show-messages [-JT ] [-t target-client ]

Show client messages or server information. Any messages displayed on the status line are saved in a per-client message log, up to a maximum of the limit set by the message-limit server option. With -t display the log for target-client -J and -T show debugging information about jobs and terminals.

source-file [-nqv ] path ...

Execute commands from one or more files specified by path (which may be glob(7) patterns). If -q is given, no error will be returned if path does not exist. With -n the file is parsed but no commands are executed. -v shows the parsed commands and line numbers if possible.

start-server

Start the tmux server, if not already running, without creating any sessions.

Note that as by default the tmux server will exit with no sessions, this is only useful if a session is created in ~/.tmux.conf exit-empty is turned off, or another command is run as part of the same command sequence. For example:

$ tmux start \; show -g

suspend-client [-t target-client ]

Suspend a client by sending SIGTSTP (tty stop).

switch-client [-ElnprZ ] [-c target-client ] [-t target-session ] [-T key-table ]

Switch the current session for client target-client to target-session As a special case, -t may refer to a pane (a target that contains `:' , `.' or `%' ) , to change session, window and pane. In that case, -Z keeps the window zoomed if it was zoomed. If -l -n or -p is used, the client is moved to the last, next or previous session respectively. -r toggles whether a client is read-only (see the attach-session command).

If -E is used, update-environment option will not be applied.

-T sets the client's key table; the next key from the client will be interpreted from key-table This may be used to configure multiple prefix keys, or to bind commands to sequences of keys. For example, to make typing `abc' run the list-keys command:

bind-key -Ttable2 c list-keys
bind-key -Ttable1 b switch-client -Ttable2
bind-key -Troot   a switch-client -Ttable1

WINDOWS AND PANES

By default, a tmux pane permits direct access to the terminal contained in the pane. A pane may also be put into one of several modes:

Copy mode, which permits a section of a window or its

history to be copied to a paste buffer for later insertion into another window. This mode is entered with the copy-mode command, bound to `[' by default.

View mode, which is like copy mode but is entered when a command that produces

output, such as list-keys is executed from a key binding.

Choose mode, which allows an item to be chosen from a list.

This may be a client, a session or window or pane, or a buffer. This mode is entered with the choose-buffer choose-client and choose-tree commands.

In copy mode an indicator is displayed in the top-right corner of the pane with the current position and the number of lines in the history.

Commands are sent to copy mode using the -X flag to the send-keys command. When a key is pressed, copy mode automatically uses one of two key tables, depending on the mode-keys option: copy-mode for emacs, or copy-mode-vi for vi. Key tables may be viewed with the list-keys command.

The following commands are supported in copy mode:

Command Ta vi Ta emacs

append-selection Ta Ta

append-selection-and-cancel Ta A Ta

back-to-indentation Ta ^ Ta M-m

begin-selection Ta Space Ta C-Space

bottom-line Ta L Ta

cancel Ta q Ta Escape

clear-selection Ta Escape Ta C-g

copy-end-of-line [<prefix>] Ta D Ta C-k

copy-line [<prefix>] Ta Ta

copy-pipe <command> [<prefix>] Ta Ta

copy-pipe-no-clear <command> [<prefix>] Ta Ta

copy-pipe-and-cancel <command> [<prefix>] Ta Ta

copy-selection [<prefix>] Ta Ta

copy-selection-no-clear [<prefix>] Ta Ta

copy-selection-and-cancel [<prefix>] Ta Enter Ta M-w

cursor-down Ta j Ta Down

cursor-down-and-cancel Ta Ta

cursor-left Ta h Ta Left

cursor-right Ta l Ta Right

cursor-up Ta k Ta Up

end-of-line Ta $ Ta C-e

goto-line <line> Ta : Ta g

halfpage-down Ta C-d Ta M-Down

halfpage-down-and-cancel Ta Ta

halfpage-up Ta C-u Ta M-Up

history-bottom Ta G Ta M->

history-top Ta g Ta M-<

jump-again Ta ; Ta ;

jump-backward <to> Ta F Ta F

jump-forward <to> Ta f Ta f

jump-reverse Ta , Ta ,

jump-to-backward <to> Ta T Ta

jump-to-forward <to> Ta t Ta

middle-line Ta M Ta M-r

next-matching-bracket Ta % Ta M-C-f

next-paragraph Ta } Ta M-}

next-space Ta W Ta

next-space-end Ta E Ta

next-word Ta w Ta

next-word-end Ta e Ta M-f

other-end Ta o Ta

page-down Ta C-f Ta PageDown

page-down-and-cancel Ta Ta

page-up Ta C-b Ta PageUp

previous-matching-bracket Ta Ta M-C-b

previous-paragraph Ta { Ta M-{

previous-space Ta B Ta

previous-word Ta b Ta M-b

rectangle-toggle Ta v Ta R

scroll-down Ta C-e Ta C-Down

scroll-down-and-cancel Ta Ta

scroll-up Ta C-y Ta C-Up

search-again Ta n Ta n

search-backward <for> Ta ? Ta

search-backward-incremental <for> Ta Ta C-r

search-backward-text <for> Ta Ta

search-forward <for> Ta / Ta

search-forward-incremental <for> Ta Ta C-s

search-forward-text <for> Ta Ta

search-reverse Ta N Ta N

select-line Ta V Ta

select-word Ta Ta

start-of-line Ta 0 Ta C-a

stop-selection Ta Ta

top-line Ta H Ta M-R

The search commands come in several varieties: `search-forward' and `search-backward' search for a regular expression; the `-text' variants search for a plain text string rather than a regular expression; `-incremental' perform an incremental search and expect to be used with the -i flag to the command-prompt command. `search-again' repeats the last search and `search-reverse' does the same but reverses the direction (forward becomes backward and backward becomes forward).

Copy commands may take an optional buffer prefix argument which is used to generate the buffer name (the default is `buffer' so buffers are named `buffer0' , `buffer1' and so on). Pipe commands take a command argument which is the command to which the copied text is piped. The `-and-cancel' variants of some commands exit copy mode after they have completed (for copy commands) or when the cursor reaches the bottom (for scrolling commands). `-no-clear' variants do not clear the selection.

The next and previous word keys use space and the `-' , `_' and `@' characters as word delimiters by default, but this can be adjusted by setting the word-separators session option. Next word moves to the start of the next word, next word end to the end of the next word and previous word to the start of the previous word. The three next and previous space keys work similarly but use a space alone as the word separator.

The jump commands enable quick movement within a line. For instance, typing `f' followed by `/' will move the cursor to the next `/' character on the current line. A `;' will then jump to the next occurrence.

Commands in copy mode may be prefaced by an optional repeat count. With vi key bindings, a prefix is entered using the number keys; with emacs, the Alt (meta) key and a number begins prefix entry.

The synopsis for the copy-mode command is:

copy-mode [-eHMqu ] [-t target-pane ]

Enter copy mode. The -u option scrolls one page up. -M begins a mouse drag (only valid if bound to a mouse key binding, see Sx MOUSE SUPPORT ) . -H hides the position indicator in the top right. -q cancels copy mode and any other modes.

-e specifies that scrolling to the bottom of the history (to the visible screen) should exit copy mode. While in copy mode, pressing a key other than those used for scrolling will disable this behaviour. This is intended to allow fast scrolling through a pane's history, for example with:

bind PageUp copy-mode -eu

A number of preset arrangements of panes are available, these are called layouts. These may be selected with the select-layout command or cycled with next-layout (bound to `Space' by default); once a layout is chosen, panes within it may be moved and resized as normal.

The following layouts are supported:

even-horizontal

Panes are spread out evenly from left to right across the window.

even-vertical

Panes are spread evenly from top to bottom.

main-horizontal

A large (main) pane is shown at the top of the window and the remaining panes are spread from left to right in the leftover space at the bottom. Use the main-pane-height window option to specify the height of the top pane.

main-vertical

Similar to main-horizontal but the large pane is placed on the left and the others spread from top to bottom along the right. See the main-pane-width window option.

tiled

Panes are spread out as evenly as possible over the window in both rows and columns.

In addition, select-layout may be used to apply a previously used layout - the list-windows command displays the layout of each window in a form suitable for use with select-layout For example:

$ tmux list-windows
0: ksh [159x48]
    layout: bb62,159x48,0,0{79x48,0,0,79x48,80,0}
$ tmux select-layout bb62,159x48,0,0{79x48,0,0,79x48,80,0}

tmux automatically adjusts the size of the layout for the current window size. Note that a layout cannot be applied to a window with more panes than that from which the layout was originally defined.

Commands related to windows and panes are as follows:

break-pane [-dP ] [-F format ] [-n window-name ] [-s src-pane ] [-t dst-window ]

Break src-pane off from its containing window to make it the only pane in dst-window If -d is given, the new window does not become the current window. The -P option prints information about the new window after it has been created. By default, it uses the format `#{session_name}:#{window_index}' but a different format may be specified with -F

capture-pane [-aepPqCJN ] [-b buffer-name ] [-E end-line ] [-S start-line ] [-t target-pane ]

Capture the contents of a pane. If -p is given, the output goes to stdout, otherwise to the buffer specified with -b or a new buffer if omitted. If -a is given, the alternate screen is used, and the history is not accessible. If no alternate screen exists, an error will be returned unless -q is given. If -e is given, the output includes escape sequences for text and background attributes. -C also escapes non-printable characters as octal \xxx. -N preserves trailing spaces at each line's end and -J preserves trailing spaces and joins any wrapped lines. -P captures only any output that the pane has received that is the beginning of an as-yet incomplete escape sequence.

-S and -E specify the starting and ending line numbers, zero is the first line of the visible pane and negative numbers are lines in the history. `-' to -S is the start of the history and to -E the end of the visible pane. The default is to capture only the visible contents of the pane.

choose-client [-NrZ ] [-F format ] [-f filter ] [-O sort-order ] [-t target-pane ] [template ]

Put a pane into client mode, allowing a client to be selected interactively from a list. -Z zooms the pane. The following keys may be used in client mode:

Key Ta Function

Enter Ta Choose selected client

Up Ta Select previous client

Down Ta Select next client

C-s Ta Search by name

n Ta Repeat last search

t Ta Toggle if client is tagged

T Ta Tag no clients

C-t Ta Tag all clients

d Ta Detach selected client

D Ta Detach tagged clients

x Ta Detach and HUP selected client

X Ta Detach and HUP tagged clients

z Ta Suspend selected client

Z Ta Suspend tagged clients

f Ta Enter a format to filter items

O Ta Change sort field

r Ta Reverse sort order

v Ta Toggle preview

q Ta Exit mode

After a client is chosen, `%%' is replaced by the client name in template and the result executed as a command. If template is not given, "detach-client -t '%%'" is used.

-O specifies the initial sort field: one of `name' , `size' , `creation' , or `activity' -r reverses the sort order. -f specifies an initial filter: the filter is a format - if it evaluates to zero, the item in the list is not shown, otherwise it is shown. If a filter would lead to an empty list, it is ignored. -F specifies the format for each item in the list. -N starts without the preview. This command works only if at least one client is attached.

choose-tree [-GNrswZ ] [-F format ] [-f filter ] [-O sort-order ] [-t target-pane ] [template ]

Put a pane into tree mode, where a session, window or pane may be chosen interactively from a list. -s starts with sessions collapsed and -w with windows collapsed. -Z zooms the pane. The following keys may be used in tree mode:

Key Ta Function

Enter Ta Choose selected item

Up Ta Select previous item

Down Ta Select next item

x Ta Kill selected item

X Ta Kill tagged items

< Ta Scroll list of previews left

> Ta Scroll list of previews right

C-s Ta Search by name

n Ta Repeat last search

t Ta Toggle if item is tagged

T Ta Tag no items

C-t Ta Tag all items

: Ta Run a command for each tagged item

f Ta Enter a format to filter items

O Ta Change sort field

r Ta Reverse sort order

v Ta Toggle preview

q Ta Exit mode

After a session, window or pane is chosen, `%%' is replaced by the target in template and the result executed as a command. If template is not given, "switch-client -t '%%'" is used.

-O specifies the initial sort field: one of `index' , `name' , or `time' -r reverses the sort order. -f specifies an initial filter: the filter is a format - if it evaluates to zero, the item in the list is not shown, otherwise it is shown. If a filter would lead to an empty list, it is ignored. -F specifies the format for each item in the tree. -N starts without the preview. -G includes all sessions in any session groups in the tree rather than only the first. This command works only if at least one client is attached.

display-panes [-b ] [-d duration ] [-t target-client ] [template ]

Display a visible indicator of each pane shown by target-client See the display-panes-colour and display-panes-active-colour session options. The indicator is closed when a key is pressed or duration milliseconds have passed. If -d is not given, display-panes-time is used. A duration of zero means the indicator stays until a key is pressed. While the indicator is on screen, a pane may be chosen with the `0' to `9' keys, which will cause template to be executed as a command with `%%' substituted by the pane ID. The default template is "select-pane -t '%%'". With -b other commands are not blocked from running until the indicator is closed.

find-window [-rCNTZ ] [-t target-pane ] match-string

Search for a fnmatch(3) pattern or, with -r regular expression match-string in window names, titles, and visible content (but not history). The flags control matching behavior: -C matches only visible window contents, -N matches only the window name and -T matches only the window title. The default is -CNT -Z zooms the pane.

This command works only if at least one client is attached.

join-pane [-bdfhv ] [-l size ] [-s src-pane ] [-t dst-pane ]

Like split-window but instead of splitting dst-pane and creating a new pane, split it and move src-pane into the space. This can be used to reverse break-pane The -b option causes src-pane to be joined to left of or above dst-pane

If -s is omitted and a marked pane is present (see select-pane -m ) the marked pane is used rather than the current pane.

kill-pane [-a ] [-t target-pane ]

Destroy the given pane. If no panes remain in the containing window, it is also destroyed. The -a option kills all but the pane given with -t

kill-window [-a ] [-t target-window ]

Kill the current window or the window at target-window removing it from any sessions to which it is linked. The -a option kills all but the window given with -t

last-pane [-deZ ] [-t target-window ]

Select the last (previously selected) pane. -Z keeps the window zoomed if it was zoomed. -e enables or -d disables input to the pane.

last-window [-t target-session ]

Select the last (previously selected) window. If no target-session is specified, select the last window of the current session.

link-window [-adk ] [-s src-window ] [-t dst-window ]

Link the window at src-window to the specified dst-window If dst-window is specified and no such window exists, the src-window is linked there. With -a the window is moved to the next index up (following windows are moved if necessary). If -k is given and dst-window exists, it is killed, otherwise an error is generated. If -d is given, the newly linked window is not selected.

list-panes [-as ] [-F format ] [-t target ]

If -a is given, target is ignored and all panes on the server are listed. If -s is given, target is a session (or the current session). If neither is given, target is a window (or the current window). For the meaning of the -F flag, see the Sx FORMATS section.

list-windows [-a ] [-F format ] [-t target-session ]

If -a is given, list all windows on the server. Otherwise, list windows in the current session or in target-session For the meaning of the -F flag, see the Sx FORMATS section.

move-pane [-bdhv ] [-l size ] [-s src-pane ] [-t dst-pane ]

Like join-pane but src-pane and dst-pane may belong to the same window.

move-window [-ardk ] [-s src-window ] [-t dst-window ]

This is similar to link-window except the window at src-window is moved to dst-window With -r all windows in the session are renumbered in sequential order, respecting the base-index option.

new-window [-adkP ] [-c start-directory ] [-e environment ] [-F format ] [-n window-name ] [-t target-window ] [shell-command ]

Create a new window. With -a the new window is inserted at the next index up from the specified target-window moving windows up if necessary, otherwise target-window is the new window location.

If -d is given, the session does not make the new window the current window. target-window represents the window to be created; if the target already exists an error is shown, unless the -k flag is used, in which case it is destroyed. shell-command is the command to execute. If shell-command is not specified, the value of the default-command option is used. -c specifies the working directory in which the new window is created.

When the shell command completes, the window closes. See the remain-on-exit option to change this behaviour.

-e takes the form `VARIABLE=value' and sets an environment variable for the newly created window; it may be specified multiple times.

The TERM environment variable must be set to `screen' or `tmux' for all programs running inside . New windows will automatically have `TERM=screen' added to their environment, but care must be taken not to reset this in shell start-up files or by the -e option.

The -P option prints information about the new window after it has been created. By default, it uses the format `#{session_name}:#{window_index}' but a different format may be specified with -F

next-layout [-t target-window ]

Move a window to the next layout and rearrange the panes to fit.

next-window [-a ] [-t target-session ]

Move to the next window in the session. If -a is used, move to the next window with an alert.

pipe-pane [-I[[-t target-pane ] ] [shell-command ]

Pipe output sent by the program in target-pane to a shell command or vice versa. A pane may only be connected to one command at a time, any existing pipe is closed before shell-command is executed. The shell-command string may contain the special character sequences supported by the status-left option. If no shell-command is given, the current pipe (if any) is closed.

-I and -O specify which of the shell-command output streams are connected to the pane: with -I stdout is connected (so anything shell-command prints is written to the pane as if it were typed); with -O stdin is connected (so any output in the pane is piped to shell-command ) Both may be used together and if neither are specified, -O is used.

The -o option only opens a new pipe if no previous pipe exists, allowing a pipe to be toggled with a single key, for example:

bind-key C-p pipe-pane -o 'cat >>~/output.#I-#P'

previous-layout [-t target-window ]

Move to the previous layout in the session.

previous-window [-a ] [-t target-session ]

Move to the previous window in the session. With -a move to the previous window with an alert.

rename-window [-t target-window ] new-name

Rename the current window, or the window at target-window if specified, to new-name

resize-pane [-DLMRUZ ] [-t target-pane ] [-x width ] [-y height ] [adjustment ]

Resize a pane, up, down, left or right by adjustment with -U -D -L or -R or to an absolute size with -x or -y The adjustment is given in lines or columns (the default is 1); -x and -y may be a given as a number of lines or columns or followed by `%' for a percentage of the window size (for example `-x' 10% ) . With -Z the active pane is toggled between zoomed (occupying the whole of the window) and unzoomed (its normal position in the layout).

-M begins mouse resizing (only valid if bound to a mouse key binding, see Sx MOUSE SUPPORT ) .

resize-window [-aADLRU ] [-t target-window ] [-x width ] [-y height ] [adjustment ]

Resize a window, up, down, left or right by adjustment with -U -D -L or -R or to an absolute size with -x or -y The adjustment is given in lines or cells (the default is 1). -A sets the size of the largest session containing the window; -a the size of the smallest. This command will automatically set window-size to manual in the window options.

respawn-pane [-k ] [-c start-directory ] [-e environment ] [-t target-pane ] [shell-command ]

Reactivate a pane in which the command has exited (see the remain-on-exit window option). If shell-command is not given, the command used when the pane was created is executed. The pane must be already inactive, unless -k is given, in which case any existing command is killed. -c specifies a new working directory for the pane. The -e option has the same meaning as for the new-window command.

respawn-window [-k ] [-c start-directory ] [-e environment ] [-t target-window ] [shell-command ]

Reactivate a window in which the command has exited (see the remain-on-exit window option). If shell-command is not given, the command used when the window was created is executed. The window must be already inactive, unless -k is given, in which case any existing command is killed. -c specifies a new working directory for the window. The -e option has the same meaning as for the new-window command.

rotate-window [-DUZ ] [-t target-window ]

Rotate the positions of the panes within a window, either upward (numerically lower) with -U or downward (numerically higher). -Z keeps the window zoomed if it was zoomed.

select-layout [-Enop ] [-t target-pane ] [layout-name ]

Choose a specific layout for a window. If layout-name is not given, the last preset layout used (if any) is reapplied. -n and -p are equivalent to the next-layout and previous-layout commands. -o applies the last set layout if possible (undoes the most recent layout change). -E spreads the current pane and any panes next to it out evenly.

select-pane [-DdeLlMmRUZ ] [-T title ] [-t target-pane ]

Make pane target-pane the active pane in window target-window If one of -D -L -R or -U is used, respectively the pane below, to the left, to the right, or above the target pane is used. -Z keeps the window zoomed if it was zoomed. -l is the same as using the last-pane command. -e enables or -d disables input to the pane. -T sets the pane title.

-m and -M are used to set and clear the marked pane There is one marked pane at a time, setting a new marked pane clears the last. The marked pane is the default target for -s to join-pane swap-pane and swap-window

select-window [-lnpT ] [-t target-window ]

Select the window at target-window -l -n and -p are equivalent to the last-window next-window and previous-window commands. If -T is given and the selected window is already the current window, the command behaves like last-window

split-window [-bdfhIvP ] [-c start-directory ] [-e environment ] [-l size ] [-t target-pane ] [shell-command ] [-F format ]

Create a new pane by splitting target-pane -h does a horizontal split and -v a vertical split; if neither is specified, -v is assumed. The -l option specifies the size of the new pane in lines (for vertical split) or in columns (for horizontal split); size may be followed by `%' to specify a percentage of the available space. The -b option causes the new pane to be created to the left of or above target-pane The -f option creates a new pane spanning the full window height (with -h or full window width (with -v ) instead of splitting the active pane.

An empty shell-command ('') will create a pane with no command running in it. Output can be sent to such a pane with the display-message command. The -I flag (if shell-command is not specified or empty) will create an empty pane and forward any output from stdin to it. For example:

$ make 2>&1|tmux splitw -dI &

All other options have the same meaning as for the new-window command.

swap-pane [-dDUZ ] [-s src-pane ] [-t dst-pane ]

Swap two panes. If -U is used and no source pane is specified with -s dst-pane is swapped with the previous pane (before it numerically); -D swaps with the next pane (after it numerically). -d instructs tmux not to change the active pane and -Z keeps the window zoomed if it was zoomed.

If -s is omitted and a marked pane is present (see select-pane -m ) the marked pane is used rather than the current pane.

swap-window [-d ] [-s src-window ] [-t dst-window ]

This is similar to link-window except the source and destination windows are swapped. It is an error if no window exists at src-window If -d is given, the new window does not become the current window.

If -s is omitted and a marked pane is present (see select-pane -m ) the window containing the marked pane is used rather than the current window.

unlink-window [-k ] [-t target-window ]

Unlink target-window Unless -k is given, a window may be unlinked only if it is linked to multiple sessions - windows may not be linked to no sessions; if -k is specified and the window is linked to only one session, it is unlinked and destroyed.

KEY BINDINGS

bind-key '"' split-window
bind-key "'" new-window

A command bound to the Any key will execute for all keys which do not have a more specific binding.

Commands related to key bindings are as follows:

bind-key [-nr ] [-N note ] [-T key-table ] key command [arguments ]

Bind key key to command Keys are bound in a key table. By default (without -T), the key is bound in the prefix key table. This table is used for keys pressed after the prefix key (for example, by default `c' is bound to new-window in the prefix table, so `C-b' c creates a new window). The root table is used for keys pressed without the prefix key: binding `c' to new-window in the root table (not recommended) means a plain `c' will create a new window. -n is an alias for -T root Keys may also be bound in custom key tables and the switch-client -T command used to switch to them from a key binding. The -r flag indicates this key may repeat, see the repeat-time option. -N attaches a note to the key (shown with list-keys -N )

To view the default bindings and possible commands, see the list-keys command.

list-keys [-1aN ] [-P prefix-string -T key-table ] [key ]

List key bindings. There are two forms: the default lists keys as bind-key commands; -N lists only keys with attached notes and shows only the key and note for each key.

With the default form, all key tables are listed by default. -T lists only keys in key-table

With the -N form, only keys in the root and prefix key tables are listed by default; -T also lists only keys in key-table -P specifies a prefix to print before each key and -1 lists only the first matching key. -a lists the command for keys that do have a note rather than skipping them.

send-keys [-FHlMRX ] [-N repeat-count ] [-t target-pane ] key ...

Send a key or keys to a window. Each argument key is the name of the key (such as `C-a' or `NPage' ) to send; if the string is not recognised as a key, it is sent as a series of characters. All arguments are sent sequentially from first to last.

The -l flag disables key name lookup and processes the keys as literal UTF-8 characters. The -H flag expects each key to be a hexadecimal number for an ASCII character.

The -R flag causes the terminal state to be reset.

-M passes through a mouse event (only valid if bound to a mouse key binding, see Sx MOUSE SUPPORT ) .

-X is used to send a command into copy mode - see the Sx WINDOWS AND PANES section. -N specifies a repeat count and -F expands formats in arguments where appropriate.

send-prefix [-2 ] [-t target-pane ]

Send the prefix key, or with -2 the secondary prefix key, to a window as if it was pressed.

unbind-key [-an ] [-T key-table ] key

Unbind the command bound to key -n and -T are the same as for bind-key If -a is present, all key bindings are removed.

OPTIONS

The tmux server has a set of global server options which do not apply to any particular window or session or pane. These are altered with the set-option -s command, or displayed with the show-options -s command.

In addition, each individual session may have a set of session options, and there is a separate set of global session options. Sessions which do not have a particular option configured inherit the value from the global session options. Session options are set or unset with the set-option command and may be listed with the show-options command. The available server and session options are listed under the set-option command.

Similarly, a set of window options is attached to each window and a set of pane options to each pane. Pane options inherit from window options. This means any pane option may be set as a window option to apply the option to all panes in the window without the option set, for example these commands will set the background colour to red for all panes except pane 0:

set -w window-style bg=red
set -pt:.0 window-style bg=blue

There is also a set of global window options from which any unset window or pane options are inherited. Window and pane options are altered with set-option -w and -p commands and displayed with show-option -w and -p

tmux also supports user options which are prefixed with a `@' User options may have any name, so long as they are prefixed with `@' , and be set to any string. For example:

$ tmux setw -q @foo "abc123"
$ tmux showw -v @foo
abc123

Commands which set options are as follows:

set-option [-aFgopqsuw ] [-t target-pane ] option value

Set a pane option with -p a window option with -w a server option with -s otherwise a session option. If the option is not a user option, -w or -s may be unnecessary - tmux will infer the type from the option name, assuming -w for pane options. If -g is given, the global session or window option is set.

-F expands formats in the option value. The -u flag unsets an option, so a session inherits the option from the global options (or with -g restores a global option to the default).

The -o flag prevents setting an option that is already set and the -q flag suppresses errors about unknown or ambiguous options.

With -a and if the option expects a string or a style, value is appended to the existing setting. For example:

set -g status-left "foo"
set -ag status-left "bar"

Will result in `foobar' And:

set -g status-style "bg=red"
set -ag status-style "fg=blue"

Will result in a red background and blue foreground. Without -a the result would be the default background and a blue foreground.

show-options [-AgHpqsvw ] [-t target-pane ] [option ]

Show the pane options (or a single option if option is provided) with -p the window options with -w the server options with -s otherwise the session options. If the option is not a user option, -w or -s may be unnecessary - tmux will infer the type from the option name, assuming -w for pane options. Global session or window options are listed if -g is used. -v shows only the option value, not the name. If -q is set, no error will be returned if option is unset. -H includes hooks (omitted by default). -A includes options inherited from a parent set of options, such options are marked with an asterisk. value depends on the option and may be a number, a string, or a flag (on, off, or omitted to toggle).

Available server options are:

backspace key

Set the key sent by tmux for backspace.

buffer-limit number

Set the number of buffers; as new buffers are added to the top of the stack, old ones are removed from the bottom if necessary to maintain this maximum length.

command-alias[] name=value

This is an array of custom aliases for commands. If an unknown command matches name it is replaced with value For example, after:

set -s command-alias[100] zoom='resize-pane -Z'

Using:

zoom -t:.1

Is equivalent to:

resize-pane -Z -t:.1

Note that aliases are expanded when a command is parsed rather than when it is executed, so binding an alias with bind-key will bind the expanded form.

default-terminal terminal

Set the default terminal for new windows created in this session - the default value of the TERM environment variable. For tmux to work correctly, this must be set to `screen' , `tmux' or a derivative of them.

escape-time time

Set the time in milliseconds for which tmux waits after an escape is input to determine if it is part of a function or meta key sequences. The default is 500 milliseconds.

exit-empty [on | off ]

If enabled (the default), the server will exit when there are no active sessions.

exit-unattached [on | off ]

If enabled, the server will exit when there are no attached clients.

focus-events [on | off ]

When enabled, focus events are requested from the terminal if supported and passed through to applications running in . Attached clients should be detached and attached again after changing this option.

history-file path

If not empty, a file to which tmux will write command prompt history on exit and load it from on start.

message-limit number

Set the number of error or information messages to save in the message log for each client. The default is 100.

set-clipboard [on | external | off ]

Attempt to set the terminal clipboard content using the xterm(1) escape sequence, if there is an entry in the terminfo(5) description (see the Sx TERMINFO EXTENSIONS section).

If set to on tmux will both accept the escape sequence to create a buffer and attempt to set the terminal clipboard. If set to external tmux will attempt to set the terminal clipboard but ignore attempts by applications to set tmux buffers. If off tmux will neither accept the clipboard escape sequence nor attempt to set the clipboard.

Note that this feature needs to be enabled in xterm(1) by setting the resource:

disallowedWindowOps: 20,21,SetXprop

Or changing this property from the xterm(1) interactive menu when required.

terminal-overrides[] string

Allow terminal descriptions read using terminfo(5) to be overridden. Each entry is a colon-separated string made up of a terminal type pattern (matched using fnmatch(3)) and a set of name=value entries.

For example, to set the `clear' terminfo(5) entry to `\e[H\e[2J' for all terminal types matching `rxvt*' :

"rxvt*:clear=\e[H\e[2J"

The terminal entry value is passed through strunvis(3) before interpretation.

user-keys[] key

Set list of user-defined key escape sequences. Each item is associated with a key named `User0' , `User1' , and so on.

For example:

set -s user-keys[0] "\e[5;30012~"
bind User0 resize-pane -L 3

Available session options are:

activity-action [any | none | current | other ]

Set action on window activity when monitor-activity is on. any means activity in any window linked to a session causes a bell or message (depending on visual-activity in the current window of that session, none means all activity is ignored (equivalent to monitor-activity being off), current means only activity in windows other than the current window are ignored and other means activity in the current window is ignored but not those in other windows.

assume-paste-time milliseconds

If keys are entered faster than one in milliseconds they are assumed to have been pasted rather than typed and tmux key bindings are not processed. The default is one millisecond and zero disables.

base-index index

Set the base index from which an unused index should be searched when a new window is created. The default is zero.

bell-action [any | none | current | other ]

Set action on a bell in a window when monitor-bell is on. The values are the same as those for activity-action

default-command shell-command

Set the command used for new windows (if not specified when the window is created) to shell-command which may be any sh(1) command. The default is an empty string, which instructs tmux to create a login shell using the value of the default-shell option.

default-shell path

Specify the default shell. This is used as the login shell for new windows when the default-command option is set to empty, and must be the full path of the executable. When started tmux tries to set a default value from the first suitable of the SHELL environment variable, the shell returned by getpwuid(3), or /bin/sh This option should be configured when tmux is used as a login shell.

default-size XxY

Set the default size of new windows when the window-size option is set to manual or when a session is created with new-session -d The value is the width and height separated by an `x' character. The default is 80x24.

destroy-unattached [on | off ]

If enabled and the session is no longer attached to any clients, it is destroyed.

detach-on-destroy [on | off ]

If on (the default), the client is detached when the session it is attached to is destroyed. If off, the client is switched to the most recently active of the remaining sessions.

display-panes-active-colour colour

Set the colour used by the display-panes command to show the indicator for the active pane.

display-panes-colour colour

Set the colour used by the display-panes command to show the indicators for inactive panes.

display-panes-time time

Set the time in milliseconds for which the indicators shown by the display-panes command appear.

display-time time

Set the amount of time for which status line messages and other on-screen indicators are displayed. If set to 0, messages and indicators are displayed until a key is pressed. time is in milliseconds.

history-limit lines

Set the maximum number of lines held in window history. This setting applies only to new windows - existing window histories are not resized and retain the limit at the point they were created.

key-table key-table

Set the default key table to key-table instead of root

lock-after-time number

Lock the session (like the lock-session command) after number seconds of inactivity. The default is not to lock (set to 0).

lock-command shell-command

Command to run when locking each client. The default is to run lock(1) with -np

message-command-style style

Set status line message command style. For how to specify style see the Sx STYLES section.

message-style style

Set status line message style. For how to specify style see the Sx STYLES section.

mouse [on | off ]

If on, tmux captures the mouse and allows mouse events to be bound as key bindings. See the Sx MOUSE SUPPORT section for details.

prefix key

Set the key accepted as a prefix key. In addition to the standard keys described under Sx KEY BINDINGS , prefix can be set to the special key `None' to set no prefix.

prefix2 key

Set a secondary key accepted as a prefix key. Like prefix prefix2 can be set to `None'

renumber-windows [on | off ]

If on, when a window is closed in a session, automatically renumber the other windows in numerical order. This respects the base-index option if it has been set. If off, do not renumber the windows.

repeat-time time

Allow multiple commands to be entered without pressing the prefix-key again in the specified time milliseconds (the default is 500). Whether a key repeats may be set when it is bound using the -r flag to bind-key Repeat is enabled for the default keys bound to the resize-pane command.

set-titles [on | off ]

Attempt to set the client terminal title using the tsl and fsl terminfo(5) entries if they exist. tmux automatically sets these to the \e]0;...\007 sequence if the terminal appears to be xterm(1). This option is off by default.

set-titles-string string

String used to set the client terminal title if set-titles is on. Formats are expanded, see the Sx FORMATS section.

silence-action [any | none | current | other ]

Set action on window silence when monitor-silence is on. The values are the same as those for activity-action

status [off | on | 2 | 3 | 4 | 5 ]

Show or hide the status line or specify its size. Using on gives a status line one row in height; 2 3 4 or 5 more rows.

status-format[] format

Specify the format to be used for each line of the status line. The default builds the top status line from the various individual status options below.

status-interval interval

Update the status line every interval seconds. By default, updates will occur every 15 seconds. A setting of zero disables redrawing at interval.

status-justify [left | centre | right ]

Set the position of the window list component of the status line: left, centre or right justified.

status-keys [vi | emacs ]

Use vi or emacs-style key bindings in the status line, for example at the command prompt. The default is emacs, unless the VISUAL or EDITOR environment variables are set and contain the string `vi'

status-left string

Display string (by default the session name) to the left of the status line. string will be passed through strftime(3). Also see the Sx FORMATS and Sx STYLES sections.

For details on how the names and titles can be set see the Sx NAMES AND TITLES section.

Examples are:

#(sysctl vm.loadavg)
#[fg=yellow,bold]#(apm -l)%%#[default] [#S]

The default is `[#S]' .

status-left-length length

Set the maximum length of the left component of the status line. The default is 10.

status-left-style style

Set the style of the left part of the status line. For how to specify style see the Sx STYLES section.

status-position [top | bottom ]

Set the position of the status line.

status-right string

Display string to the right of the status line. By default, the current pane title in double quotes, the date and the time are shown. As with status-left string will be passed to strftime(3) and character pairs are replaced.

status-right-length length

Set the maximum length of the right component of the status line. The default is 40.

status-right-style style

Set the style of the right part of the status line. For how to specify style see the Sx STYLES section.

status-style style

Set status line style. For how to specify style see the Sx STYLES section.

update-environment[] variable

Set list of environment variables to be copied into the session environment when a new session is created or an existing session is attached. Any variables that do not exist in the source environment are set to be removed from the session environment (as if -r was given to the set-environment command).

visual-activity [on | off | both ]

If on, display a message instead of sending a bell when activity occurs in a window for which the monitor-activity window option is enabled. If set to both, a bell and a message are produced.

visual-bell [on | off | both ]

If on, a message is shown on a bell in a window for which the monitor-bell window option is enabled instead of it being passed through to the terminal (which normally makes a sound). If set to both, a bell and a message are produced. Also see the bell-action option.

visual-silence [on | off | both ]

If monitor-silence is enabled, prints a message after the interval has expired on a given window instead of sending a bell. If set to both, a bell and a message are produced.

word-separators string

Sets the session's conception of what characters are considered word separators, for the purposes of the next and previous word commands in copy mode. The default is `-_@ .'

Available window options are:

aggressive-resize [on | off ]

Aggressively resize the chosen window. This means that tmux will resize the window to the size of the smallest or largest session (see the window-size option) for which it is the current window, rather than the session to which it is attached. The window may resize when the current window is changed on another session; this option is good for full-screen programs which support SIGWINCH and poor for interactive programs such as shells.

automatic-rename [on | off ]

Control automatic window renaming. When this setting is enabled, tmux will rename the window automatically using the format specified by automatic-rename-format This flag is automatically disabled for an individual window when a name is specified at creation with new-window or new-session or later with rename-window or with a terminal escape sequence. It may be switched off globally with:

set-option -wg automatic-rename off

automatic-rename-format format

The format (see Sx FORMATS ) used when the automatic-rename option is enabled.

clock-mode-colour colour

Set clock colour.

clock-mode-style [12 | 24 ]

Set clock hour format.

main-pane-height height

main-pane-width width

Set the width or height of the main (left or top) pane in the main-horizontal or main-vertical layouts.

mode-keys [vi | emacs ]

Use vi or emacs-style key bindings in copy mode. The default is emacs, unless VISUAL or EDITOR contains `vi'

mode-style style

Set window modes style. For how to specify style see the Sx STYLES section.

monitor-activity [on | off ]

Monitor for activity in the window. Windows with activity are highlighted in the status line.

monitor-bell [on | off ]

Monitor for a bell in the window. Windows with a bell are highlighted in the status line.

monitor-silence [interval ]

Monitor for silence (no activity) in the window within interval seconds. Windows that have been silent for the interval are highlighted in the status line. An interval of zero disables the monitoring.

other-pane-height height

Set the height of the other panes (not the main pane) in the main-horizontal layout. If this option is set to 0 (the default), it will have no effect. If both the main-pane-height and other-pane-height options are set, the main pane will grow taller to make the other panes the specified height, but will never shrink to do so.

other-pane-width width

Like other-pane-height but set the width of other panes in the main-vertical layout.

pane-active-border-style style

Set the pane border style for the currently active pane. For how to specify style see the Sx STYLES section. Attributes are ignored.

pane-base-index index

Like base-index but set the starting index for pane numbers.

pane-border-format format

Set the text shown in pane border status lines.

pane-border-status [off | top | bottom ]

Turn pane border status lines off or set their position.

pane-border-style style

Set the pane border style for panes aside from the active pane. For how to specify style see the Sx STYLES section. Attributes are ignored.

synchronize-panes [on | off ]

Duplicate input to any pane to all other panes in the same window (only for panes that are not in any special mode).

window-status-activity-style style

Set status line style for windows with an activity alert. For how to specify style see the Sx STYLES section.

window-status-bell-style style

Set status line style for windows with a bell alert. For how to specify style see the Sx STYLES section.

window-status-current-format string

Like window-status-format but is the format used when the window is the current window.

window-status-current-style style

Set status line style for the currently active window. For how to specify style see the Sx STYLES section.

window-status-format string

Set the format in which the window is displayed in the status line window list. See the Sx FORMATS and Sx STYLES sections.

window-status-last-style style

Set status line style for the last active window. For how to specify style see the Sx STYLES section.

window-status-separator string

Sets the separator drawn between windows in the status line. The default is a single space character.

window-status-style style

Set status line style for a single window. For how to specify style see the Sx STYLES section.

window-size largest | smallest | manual | latest

Configure how tmux determines the window size. If set to largest the size of the largest attached session is used; if smallest the size of the smallest. If manual the size of a new window is set from the default-size option and windows are resized automatically. With latest tmux uses the size of the client that had the most recent activity. See also the resize-window command and the aggressive-resize option.

wrap-search [on | off ]

If this option is set, searches will wrap around the end of the pane contents. The default is on.

xterm-keys [on | off ]

If this option is set, tmux will generate xterm(1)-style function key sequences; these have a number included to indicate modifiers such as Shift, Alt or Ctrl.

Available pane options are:

allow-rename [on | off ]

Allow programs in the pane to change the window name using a terminal escape sequence (\ek...\e\\).

alternate-screen [on | off ]

This option configures whether programs running inside the pane may use the terminal alternate screen feature, which allows the smcup and rmcup terminfo(5) capabilities. The alternate screen feature preserves the contents of the window when an interactive application starts and restores it on exit, so that any output visible before the application starts reappears unchanged after it exits.

remain-on-exit [on | off ]

A pane with this flag set is not destroyed when the program running in it exits. The pane may be reactivated with the respawn-pane command.

window-active-style style

Set the pane style when it is the active pane. For how to specify style see the Sx STYLES section.

window-style style

Set the pane style. For how to specify style see the Sx STYLES section.

HOOKS

Hooks are stored as array options, members of the array are executed in order when the hook is triggered. Hooks may be configured with the set-hook or set-option commands and displayed with show-hooks or show-options -H The following two commands are equivalent:

set-hook -g pane-mode-changed[42] 'set -g status-left-style bg=red'
set-option -g pane-mode-changed[42] 'set -g status-left-style bg=red'

Setting a hook without specifying an array index clears the hook and sets the first member of the array.

A command's after hook is run after it completes, except when the command is run as part of a hook itself. They are named with an `after-' prefix. For example, the following command adds a hook to select the even-vertical layout after every split-window

set-hook -g after-split-window "selectl even-vertical"

All the notifications listed in the Sx CONTROL MODE section are hooks (without any arguments), except %exit The following additional hooks are available:

alert-activity

Run when a window has activity. See monitor-activity

alert-bell

Run when a window has received a bell. See monitor-bell

alert-silence

Run when a window has been silent. See monitor-silence

client-attached

Run when a client is attached.

client-detached

Run when a client is detached

client-resized

Run when a client is resized.

client-session-changed

Run when a client's attached session is changed.

pane-died

Run when the program running in a pane exits, but remain-on-exit is on so the pane has not closed.

pane-exited

Run when the program running in a pane exits.

pane-focus-in

Run when the focus enters a pane, if the focus-events option is on.

pane-focus-out

Run when the focus exits a pane, if the focus-events option is on.

pane-set-clipboard

Run when the terminal clipboard is set using the xterm(1) escape sequence.

session-created

Run when a new session created.

session-closed

Run when a session closed.

session-renamed

Run when a session is renamed.

window-linked

Run when a window is linked into a session.

window-renamed

Run when a window is renamed.

window-unlinked

Run when a window is unlinked from a session.

Hooks are managed with these commands:

set-hook [-agRu [-t target-session ] ] hook-name command

Without -R sets (or with -u unsets) hook hook-name to command If -g is given, hook-name is added to the global list of hooks, otherwise it is added to the session hooks (for target-session with -t ) -a appends to a hook. Like options, session hooks inherit from the global ones.

With -R run hook-name immediately.

show-hooks [-g ] [-t target-session ]

Shows the global list of hooks with -g otherwise the session hooks.

MOUSE SUPPORT

Pane Ta the contents of a pane

Border Ta a pane border

Status Ta the status line window list

StatusLeft Ta the left part of the status line

StatusRight Ta the right part of the status line

StatusDefault Ta any other part of the status line

The following mouse events are available:

WheelUp Ta WheelDown Ta

MouseDown1 Ta MouseUp1 Ta MouseDrag1 Ta MouseDragEnd1

MouseDown2 Ta MouseUp2 Ta MouseDrag2 Ta MouseDragEnd2

MouseDown3 Ta MouseUp3 Ta MouseDrag3 Ta MouseDragEnd3

DoubleClick1 Ta DoubleClick2 Ta DoubleClick3

TripleClick1 Ta TripleClick2 Ta TripleClick3

Each should be suffixed with a location, for example `MouseDown1Status'

The special token `{mouse}' or `=' may be used as target-window or target-pane in commands bound to mouse key bindings. It resolves to the window or pane over which the mouse event took place (for example, the window in the status line over which button 1 was released for a `MouseUp1Status' binding, or the pane over which the wheel was scrolled for a `WheelDownPane' binding).

The send-keys -M flag may be used to forward a mouse event to a pane.

The default key bindings allow the mouse to be used to select and resize panes, to copy text and to change window using the status line. These take effect if the mouse option is turned on.  

FORMATS

Conditionals are available by prefixing with `?' and separating two alternatives with a comma; if the specified variable exists and is not zero, the first alternative is chosen, otherwise the second is used. For example `#{?session_attached,attached,not' attached} will include the string `attached' if the session is attached and the string `not' attached if it is unattached, or `#{?automatic-rename,yes,no}' will include `yes' if automatic-rename is enabled, or `no' if not. Conditionals can be nested arbitrarily. Inside a conditional, `,' and `}' must be escaped as `#,' and `#}' , unless they are part of a `#{...}' replacement. For example:

#{?pane_in_mode,#[fg=white#,bg=red],#[fg=red#,bg=white]}#W .

String comparisons may be expressed by prefixing two comma-separated alternatives by `==' , `!=' , `<' , `>' , `<=' or `>=' and a colon. For example `#{==:#{host},myhost}' will be replaced by `1' if running on `myhost' , otherwise by `0' `||' and `&&' evaluate to true if either or both of two comma-separated alternatives are true, for example `#{||:#{pane_in_mode},#{alternate_on}}'

An `m' specifies an fnmatch(3) or regular expression comparison. The first argument is the pattern and the second the string to compare. An optional third argument specifies flags: `r' means the pattern is a regular expression instead of the default fnmatch(3) pattern, and `i' means to ignore case. For example: `#{m:*foo*,#{host}}' or `#{m/ri:^A,MYVAR}' A `C' performs a search for an fnmatch(3) pattern or regular expression in the pane content and evaluates to zero if not found, or a line number if found. Like `m' , an `r' flag means search for a regular expression and `i' ignores case. For example: `#{C/r:^Start}'

A limit may be placed on the length of the resultant string by prefixing it by an `=' , a number and a colon. Positive numbers count from the start of the string and negative from the end, so `#{=5:pane_title}' will include at most the first five characters of the pane title, or `#{=-5:pane_title}' the last five characters. A suffix or prefix may be given as a second argument - if provided then it is appended or prepended to the string if the length has been trimmed, for example `#{=/5/...:pane_title}' will append `...' if the pane title is more than five characters. Similarly, `p' pads the string to a given width, for example `#{p10:pane_title}' will result in a width of at least 10 characters. A positive width pads on the left, a negative on the right.

Prefixing a time variable with `t:' will convert it to a string, so if `#{window_activity}' gives `1445765102' , `#{t:window_activity}' gives `Sun' Oct 25 09:25:02 2015 . The `b:' and `d:' prefixes are basename(3) and dirname(3) of the variable respectively. `q:' will escape sh(1) special characters. `E:' will expand the format twice, for example `#{E:status-left}' is the result of expanding the content of the status-left option rather than the option itself. `T:' is like `E:' but also expands strftime(3) specifiers. `S:' , `W:' or `P:' will loop over each session, window or pane and insert the format once for each. For windows and panes, two comma-separated formats may be given: the second is used for the current window or active pane. For example, to get a list of windows formatted like the status line:

#{W:#{E:window-status-format} ,#{E:window-status-current-format} }

A prefix of the form `s/foo/bar/:' will substitute `foo' with `bar' throughout. The first argument may be an extended regular expression and a final argument may be `i' to ignore case, for example `s/a(.)/\1x/i:' would change `abABab' into `bxBxbx'

In addition, the last line of a shell command's output may be inserted using `#()' For example, `#(uptime)' will insert the system's uptime. When constructing formats, tmux does not wait for `#()' commands to finish; instead, the previous result from running the same command is used, or a placeholder if the command has not been run before. If the command hasn't exited, the most recent line of output will be used, but the status line will not be updated more than once a second. Commands are executed with the tmux global environment set (see the Sx GLOBAL AND SESSION ENVIRONMENT section).

An `l' specifies that a string should be interpreted literally and not expanded. For example `#{l:#{?pane_in_mode,yes,no}}' will be replaced by `#{?pane_in_mode,yes,no}'

The following variables are available, where appropriate:

Variable name Ta Alias Ta Replaced with

alternate_on Ta Ta 1 if pane is in alternate screen

alternate_saved_x Ta Ta Saved cursor X in alternate screen

alternate_saved_y Ta Ta Saved cursor Y in alternate screen

buffer_created Ta Ta Time buffer created

buffer_name Ta Ta Name of buffer

buffer_sample Ta Ta Sample of start of buffer

buffer_size Ta Ta Size of the specified buffer in bytes

client_activity Ta Ta Time client last had activity

client_cell_height Ta Ta Height of each client cell in pixels

client_cell_width Ta Ta Width of each client cell in pixels

client_control_mode Ta Ta 1 if client is in control mode

client_created Ta Ta Time client created

client_discarded Ta Ta Bytes discarded when client behind

client_height Ta Ta Height of client

client_key_table Ta Ta Current key table

client_last_session Ta Ta Name of the client's last session

client_name Ta Ta Name of client

client_pid Ta Ta PID of client process

client_prefix Ta Ta 1 if prefix key has been pressed

client_readonly Ta Ta 1 if client is readonly

client_session Ta Ta Name of the client's session

client_termname Ta Ta Terminal name of client

client_tty Ta Ta Pseudo terminal of client

client_utf8 Ta Ta 1 if client supports UTF-8

client_width Ta Ta Width of client

client_written Ta Ta Bytes written to client

command Ta Ta Name of command in use, if any

command_list_alias Ta Ta Command alias if listing commands

command_list_name Ta Ta Command name if listing commands

command_list_usage Ta Ta Command usage if listing commands

copy_cursor_line Ta Ta Line the cursor is on in copy mode

copy_cursor_word Ta Ta Word under cursor in copy mode

copy_cursor_x Ta Ta Cursor X position in copy mode

copy_cursor_y Ta Ta Cursor Y position in copy mode

cursor_character Ta Ta Character at cursor in pane

cursor_flag Ta Ta Pane cursor flag

cursor_x Ta Ta Cursor X position in pane

cursor_y Ta Ta Cursor Y position in pane

history_bytes Ta Ta Number of bytes in window history

history_limit Ta Ta Maximum window history lines

history_size Ta Ta Size of history in lines

hook Ta Ta Name of running hook, if any

hook_pane Ta Ta ID of pane where hook was run, if any

hook_session Ta Ta ID of session where hook was run, if any

hook_session_name Ta Ta Name of session where hook was run, if any

hook_window Ta Ta ID of window where hook was run, if any

hook_window_name Ta Ta Name of window where hook was run, if any

host Ta #H Ta Hostname of local host

host_short Ta #h Ta Hostname of local host (no domain name)

insert_flag Ta Ta Pane insert flag

keypad_cursor_flag Ta Ta Pane keypad cursor flag

keypad_flag Ta Ta Pane keypad flag

line Ta Ta Line number in the list

mouse_all_flag Ta Ta Pane mouse all flag

mouse_any_flag Ta Ta Pane mouse any flag

mouse_button_flag Ta Ta Pane mouse button flag

mouse_line Ta Ta Line under mouse, if any

mouse_sgr_flag Ta Ta Pane mouse SGR flag

mouse_standard_flag Ta Ta Pane mouse standard flag

mouse_utf8_flag Ta Ta Pane mouse UTF-8 flag

mouse_word Ta Ta Word under mouse, if any

mouse_x Ta Ta Mouse X position, if any

mouse_y Ta Ta Mouse Y position, if any

origin_flag Ta Ta Pane origin flag

pane_active Ta Ta 1 if active pane

pane_at_bottom Ta Ta 1 if pane is at the bottom of window

pane_at_left Ta Ta 1 if pane is at the left of window

pane_at_right Ta Ta 1 if pane is at the right of window

pane_at_top Ta Ta 1 if pane is at the top of window

pane_bottom Ta Ta Bottom of pane

pane_current_command Ta Ta Current command if available

pane_current_path Ta Ta Current path if available

pane_dead Ta Ta 1 if pane is dead

pane_dead_status Ta Ta Exit status of process in dead pane

pane_format Ta Ta 1 if format is for a pane

pane_height Ta Ta Height of pane

pane_id Ta #D Ta Unique pane ID

pane_in_mode Ta Ta 1 if pane is in a mode

pane_index Ta #P Ta Index of pane

pane_input_off Ta Ta 1 if input to pane is disabled

pane_left Ta Ta Left of pane

pane_marked Ta Ta 1 if this is the marked pane

pane_marked_set Ta Ta 1 if a marked pane is set

pane_mode Ta Ta Name of pane mode, if any

pane_path Ta #T Ta Path of pane (can be set by application)

pane_pid Ta Ta PID of first process in pane

pane_pipe Ta Ta 1 if pane is being piped

pane_right Ta Ta Right of pane

pane_search_string Ta Ta Last search string in copy mode

pane_start_command Ta Ta Command pane started with

pane_synchronized Ta Ta 1 if pane is synchronized

pane_tabs Ta Ta Pane tab positions

pane_title Ta #T Ta Title of pane (can be set by application)

pane_top Ta Ta Top of pane

pane_tty Ta Ta Pseudo terminal of pane

pane_width Ta Ta Width of pane

pid Ta Ta Server PID

rectangle_toggle Ta Ta 1 if rectangle selection is activated

scroll_position Ta Ta Scroll position in copy mode

scroll_region_lower Ta Ta Bottom of scroll region in pane

scroll_region_upper Ta Ta Top of scroll region in pane

selection_active Ta Ta 1 if selection started and changes with the cursor in copy mode

selection_end_x Ta Ta X position of the end of the selection

selection_end_y Ta Ta Y position of the end of the selection

selection_present Ta Ta 1 if selection started in copy mode

selection_start_x Ta Ta X position of the start of the selection

selection_start_y Ta Ta Y position of the start of the selection

session_activity Ta Ta Time of session last activity

session_alerts Ta Ta List of window indexes with alerts

session_attached Ta Ta Number of clients session is attached to

session_attached_list Ta Ta List of clients session is attached to

session_created Ta Ta Time session created

session_format Ta Ta 1 if format is for a session

session_group Ta Ta Name of session group

session_group_attached Ta Ta Number of clients sessions in group are attached to

session_group_attached_list Ta Ta List of clients sessions in group are attached to

session_group_list Ta Ta List of sessions in group

session_group_many_attached Ta Ta 1 if multiple clients attached to sessions in group

session_group_size Ta Ta Size of session group

session_grouped Ta Ta 1 if session in a group

session_id Ta Ta Unique session ID

session_last_attached Ta Ta Time session last attached

session_many_attached Ta Ta 1 if multiple clients attached

session_name Ta #S Ta Name of session

session_stack Ta Ta Window indexes in most recent order

session_windows Ta Ta Number of windows in session

socket_path Ta Ta Server socket path

start_time Ta Ta Server start time

version Ta Ta Server version

window_active Ta Ta 1 if window active

window_active_clients Ta Ta Number of clients viewing this window

window_active_clients_list Ta Ta List of clients viewing this window

window_active_sessions Ta Ta Number of sessions on which this window is active

window_active_sessions_list Ta Ta List of sessions on which this window is active

window_activity Ta Ta Time of window last activity

window_activity_flag Ta Ta 1 if window has activity

window_bell_flag Ta Ta 1 if window has bell

window_bigger Ta Ta 1 if window is larger than client

window_cell_height Ta Ta Height of each cell in pixels

window_cell_width Ta Ta Width of each cell in pixels

window_end_flag Ta Ta 1 if window has the highest index

window_flags Ta #F Ta Window flags

window_format Ta Ta 1 if format is for a window

window_height Ta Ta Height of window

window_id Ta Ta Unique window ID

window_index Ta #I Ta Index of window

window_last_flag Ta Ta 1 if window is the last used

window_layout Ta Ta Window layout description, ignoring zoomed window panes

window_linked Ta Ta 1 if window is linked across sessions

window_linked_sessions Ta Ta Number of sessions this window is linked to

window_linked_sessions_list Ta Ta List of sessions this window is linked to

window_marked_flag Ta Ta 1 if window contains the marked pane

window_name Ta #W Ta Name of window

window_offset_x Ta Ta X offset into window if larger than client

window_offset_y Ta Ta Y offset into window if larger than client

window_panes Ta Ta Number of panes in window

window_silence_flag Ta Ta 1 if window has silence alert

window_stack_index Ta Ta Index in session most recent stack

window_start_flag Ta Ta 1 if window has the lowest index

window_visible_layout Ta Ta Window layout description, respecting zoomed window panes

window_width Ta Ta Width of window

window_zoomed_flag Ta Ta 1 if window is zoomed

wrap_flag Ta Ta Pane wrap flag

STYLES

A style may be the single term `default' to specify the default style (which may come from an option, for example status-style in the status line) or a space or comma separated list of the following:

fg=colour

Set the foreground colour. The colour is one of: black red green yellow blue magenta cyan white if supported the bright variants brightred brightgreen brightyellow colour0 to colour255 from the 256-colour set; default for the default colour; terminal for the terminal default colour; or a hexadecimal RGB string such as `#ffffff'

bg=colour

Set the background colour.

none

Set no attributes (turn off any active attributes).

bright (or bold ) dim underscore blink reverse hidden italics overline strikethrough double-underscore curly-underscore dotted-underscore dashed-underscore

Set an attribute. Any of the attributes may be prefixed with `no' to unset.

align=left (or noalign ) align=centre align=right

Align text to the left, centre or right of the available space if appropriate.

fill=colour

Fill the available space with a background colour if appropriate.

list=on list=focus list=left-marker list=right-marker nolist

Mark the position of the various window list components in the status-format option: list=on marks the start of the list; list=focus is the part of the list that should be kept in focus if the entire list won't fit in the available space (typically the current window); list=left-marker and list=right-marker mark the text to be used to mark that text has been trimmed from the left or right of the list if there is not enough space.

push-default pop-default

Store the current colours and attributes as the default or reset to the previous default. A push-default affects any subsequent use of the default term until a pop-default Only one default may be pushed (each push-default replaces the previous saved default).

range=left range=right range=window|X norange

Mark a range in the status-format option. range=left and range=right are the text used for the `StatusLeft' and `StatusRight' mouse keys. range=window|X is the range for a window passed to the `Status' mouse key, where `X' is a window index.

Examples are:

fg=yellow bold underscore blink
bg=black,fg=default,noreverse

NAMES AND TITLES

A session's name is set with the new-session and rename-session commands. A window's name is set with one of:

1. A command argument (such as -n for new-window or new-session )
2. An escape sequence (if the allow-rename option is turned on):

   $ printf '\033kWINDOW_NAME\033\\'
   

3. Automatic renaming, which sets the name to the active command in the window's active pane. See the automatic-rename option.

When a pane is first created, its title is the hostname. A pane's title can be set via the title setting escape sequence, for example:

$ printf '\033]2;My Title\033\\'

It can also be modified with the select-pane -T command.  

GLOBAL AND SESSION ENVIRONMENT

The update-environment session option may be used to update the session environment from the client when a new session is created or an old reattached. tmux also initialises the TMUX variable with some internal information to allow commands to be executed from inside, and the TERM variable with the correct terminal setting of `screen'

Commands to alter and view the environment are:

set-environment [-gru ] [-t target-session ] name [value ]

Set or unset an environment variable. If -g is used, the change is made in the global environment; otherwise, it is applied to the session environment for target-session The -u flag unsets a variable. -r indicates the variable is to be removed from the environment before starting a new process.

show-environment [-gs ] [-t target-session ] [variable ]

Display the environment for target-session or the global environment with -g If variable is omitted, all variables are shown. Variables removed from the environment are prefixed with `-' If -s is used, the output is formatted as a set of Bourne shell commands.

STATUS LINE

By default, the status line is enabled and one line in height (it may be disabled or made multiple lines with the status session option) and contains, from left-to-right: the name of the current session in square brackets; the window list; the title of the active pane in double quotes; and the time and date.

Each line of the status line is configured with the status-format option. The default is made of three parts: configurable left and right sections (which may contain dynamic content such as the time or output from a shell command, see the status-left status-left-length status-right and status-right-length options below), and a central window list. By default, the window list shows the index, name and (if any) flag of the windows present in the current session in ascending numerical order. It may be customised with the window-status-format and window-status-current-format options. The flag is one of the following symbols appended to the window name:

Symbol Ta Meaning

* Ta Denotes the current window.

- Ta Marks the last window (previously selected).

# Ta Window activity is monitored and activity has been detected.

! Ta Window bells are monitored and a bell has occurred in the window.

~ Ta The window has been silent for the monitor-silence interval.

M Ta The window contains the marked pane.

Z Ta The window's active pane is zoomed.

The # symbol relates to the monitor-activity window option. The window name is printed in inverted colours if an alert (bell, activity or silence) is present.

The colour and attributes of the status line may be configured, the entire status line using the status-style session option and individual windows using the window-status-style window option.

The status line is automatically refreshed at interval if it has changed, the interval may be controlled with the status-interval session option.

Commands related to the status line are as follows:

command-prompt [-1ikN ] [-I inputs ] [-p prompts ] [-t target-client ] [template ]

Open the command prompt in a client. This may be used from inside tmux to execute commands interactively.

If template is specified, it is used as the command. If present, -I is a comma-separated list of the initial text for each prompt. If -p is given, prompts is a comma-separated list of prompts which are displayed in order; otherwise a single prompt is displayed, constructed from template if it is present, or `:' if not.

Before the command is executed, the first occurrence of the string `%%' and all occurrences of `%1' are replaced by the response to the first prompt, all `%2' are replaced with the response to the second prompt, and so on for further prompts. Up to nine prompt responses may be replaced Po `%1' to `%9' Pc . `%%%' is like `%%' but any quotation marks are escaped.

-1 makes the prompt only accept one key press, in this case the resulting input is a single character. -k is like -1 but the key press is translated to a key name. -N makes the prompt only accept numeric key presses. -i executes the command every time the prompt input changes instead of when the user exits the command prompt.

The following keys have a special meaning in the command prompt, depending on the value of the status-keys option:

Function Ta vi Ta emacs

Cancel command prompt Ta Escape Ta Escape

Delete from cursor to start of word Ta Ta C-w

Delete entire command Ta d Ta C-u

Delete from cursor to end Ta D Ta C-k

Execute command Ta Enter Ta Enter

Get next command from history Ta Ta Down

Get previous command from history Ta Ta Up

Insert top paste buffer Ta p Ta C-y

Look for completions Ta Tab Ta Tab

Move cursor left Ta h Ta Left

Move cursor right Ta l Ta Right

Move cursor to end Ta $ Ta C-e

Move cursor to next word Ta w Ta M-f

Move cursor to previous word Ta b Ta M-b

Move cursor to start Ta 0 Ta C-a

Transpose characters Ta Ta C-t

confirm-before [-p prompt ] [-t target-client ] command

Ask for confirmation before executing command If -p is given, prompt is the prompt to display; otherwise a prompt is constructed from command It may contain the special character sequences supported by the status-left option.

This command works only from inside .

display-menu [-c target-client ] [-t target-pane ] [-T title ] [-x position ] [-y position ] name key command ...

Display a menu on target-client target-pane gives the target for any commands run from the menu.

A menu is passed as a series of arguments: first the menu item name, second the key shortcut (or empty for none) and third the command to run when the menu item is chosen. The name and command are formats, see the Sx FORMATS and Sx STYLES sections. If the name begins with a hyphen (-), then the item is disabled (shown dim) and may not be chosen. The name may be empty for a separator line, in which case both the key and command should be omitted.

-T is a format for the menu title (see Sx FORMATS ) .

-x and -y give the position of the menu. Both may be a row or column number, or one of the following special values:

Value Ta Flag Ta Meaning

R Ta -x Ta The right side of the terminal

P Ta Both Ta The bottom left of the pane

M Ta Both Ta The mouse position

W Ta -x Ta The window position on the status line

S Ta -y Ta The line above or below the status line

Each menu consists of items followed by a key shortcut shown in brackets. If the menu is too large to fit on the terminal, it is not displayed. Pressing the key shortcut chooses the corresponding item. If the mouse is enabled and the menu is opened from a mouse key binding, releasing the mouse button with an item selected will choose that item. The following keys are also available:

Key Ta Function

Enter Ta Choose selected item

Up Ta Select previous item

Down Ta Select next item

q Ta Exit menu

display-message [-aIpv ] [-c target-client ] [-t target-pane ] [message ]

Display a message. If -p is given, the output is printed to stdout, otherwise it is displayed in the target-client status line. The format of message is described in the Sx FORMATS section; information is taken from target-pane if -t is given, otherwise the active pane.

-v prints verbose logging as the format is parsed and -a lists the format variables and their values.

-I forwards any input read from stdin to the empty pane given by target-pane

BUFFERS

Buffers may be added using copy-mode or the set-buffer and load-buffer commands, and pasted into a window using the paste-buffer command. If a buffer command is used and no buffer is specified, the most recently added automatically named buffer is assumed.

A configurable history buffer is also maintained for each window. By default, up to 2000 lines are kept; this can be altered with the history-limit option (see the set-option command above).

The buffer commands are as follows:

choose-buffer [-NZr [-F format ] ] [-f filter ] [-O sort-order ] [-t target-pane ] [template ]

Put a pane into buffer mode, where a buffer may be chosen interactively from a list. -Z zooms the pane. The following keys may be used in buffer mode:

Key Ta Function

Enter Ta Paste selected buffer

Up Ta Select previous buffer

Down Ta Select next buffer

C-s Ta Search by name or content

n Ta Repeat last search

t Ta Toggle if buffer is tagged

T Ta Tag no buffers

C-t Ta Tag all buffers

p Ta Paste selected buffer

P Ta Paste tagged buffers

d Ta Delete selected buffer

D Ta Delete tagged buffers

f Ta Enter a format to filter items

O Ta Change sort field

r Ta Reverse sort order

v Ta Toggle preview

q Ta Exit mode

After a buffer is chosen, `%%' is replaced by the buffer name in template and the result executed as a command. If template is not given, "paste-buffer -b '%%'" is used.

-O specifies the initial sort field: one of `time' , `name' or `size' -r reverses the sort order. -f specifies an initial filter: the filter is a format - if it evaluates to zero, the item in the list is not shown, otherwise it is shown. If a filter would lead to an empty list, it is ignored. -F specifies the format for each item in the list. -N starts without the preview. This command works only if at least one client is attached.

clear-history [-t target-pane ]

Remove and free the history for the specified pane.

delete-buffer [-b buffer-name ]

Delete the buffer named buffer-name or the most recently added automatically named buffer if not specified.

list-buffers [-F format ]

List the global buffers. For the meaning of the -F flag, see the Sx FORMATS section.

load-buffer [-b buffer-name ] path

Load the contents of the specified paste buffer from path

paste-buffer [-dpr ] [-b buffer-name ] [-s separator ] [-t target-pane ]

Insert the contents of a paste buffer into the specified pane. If not specified, paste into the current one. With -d also delete the paste buffer. When output, any linefeed (LF) characters in the paste buffer are replaced with a separator, by default carriage return (CR). A custom separator may be specified using the -s flag. The -r flag means to do no replacement (equivalent to a separator of LF). If -p is specified, paste bracket control codes are inserted around the buffer if the application has requested bracketed paste mode.

save-buffer [-a ] [-b buffer-name ] path

Save the contents of the specified paste buffer to path The -a option appends to rather than overwriting the file.

set-buffer [-a ] [-b buffer-name ] [-n new-buffer-name ] data

Set the contents of the specified buffer to data The -a option appends to rather than overwriting the buffer. The -n option renames the buffer to new-buffer-name

show-buffer [-b buffer-name ]

Display the contents of the specified buffer.

MISCELLANEOUS

clock-mode [-t target-pane ]

Display a large clock.

if-shell [-bF ] [-t target-pane ] shell-command command [command ]

Execute the first command if shell-command returns success or the second command otherwise. Before being executed, shell-command is expanded using the rules specified in the Sx FORMATS section, including those relevant to target-pane With -b shell-command is run in the background.

If -F is given, shell-command is not executed but considered success if neither empty nor zero (after formats are expanded).

lock-server

Lock each client individually by running the command specified by the lock-command option.

run-shell [-b ] [-t target-pane ] shell-command

Execute shell-command in the background without creating a window. Before being executed, shell-command is expanded using the rules specified in the Sx FORMATS section. With -b the command is run in the background. After it finishes, any output to stdout is displayed in copy mode (in the pane specified by -t or the current pane if omitted). If the command doesn't return success, the exit status is also displayed.

wait-for [-L | S | U ] channel

When used without options, prevents the client from exiting until woken using wait-for -S with the same channel. When -L is used, the channel is locked and any clients that try to lock the same channel are made to wait until the channel is unlocked with wait-for -U

EXIT MESSAGES

[detached (from session ...)]

The client was detached normally.

[detached and SIGHUP]

The client was detached and its parent sent the SIGHUP signal (for example with detach-client -P )

[lost tty]

The client's tty(4) or pty(4) was unexpectedly destroyed.

[terminated]

The client was killed with SIGTERM

[exited]

The server exited when it had no sessions.

[server exited]

The server exited when it received SIGTERM

[server exited unexpectedly]

The server crashed or otherwise exited without telling the client the reason.

TERMINFO EXTENSIONS

Cs , Cr Set the cursor colour.

The first takes a single string argument and is used to set the colour; the second takes no arguments and restores the default cursor colour. If set, a sequence such as this may be used to change the cursor colour from inside :

$ printf '\033]12;red\033\\'

Smol

Enable the overline attribute. The capability is usually SGR 53 and can be added to terminal-overrides as:

Smol=\E[53m

Smulx

Set a styled underscore. The single parameter is one of: 0 for no underscore, 1 for normal underscore, 2 for double underscore, 3 for curly underscore, 4 for dotted underscore and 5 for dashed underscore. The capability can typically be added to terminal-overrides as:

Smulx=\E[4::%p1%dm

Setulc

Set the underscore colour. The argument is (red * 65536) + (green * 256) + blue where each is between 0 and 255. The capability can typically be added to terminal-overrides as:

Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m

, Se Set or reset the cursor style.

$ printf '\033[4 q'

If Se is not set,  

with argument 0 will be used to reset the cursor style instead.

If supported, this is used for the initialize colour escape sequence (which may be enabled by adding the `initc' and `ccc' capabilities to the tmux terminfo(5) entry). Em Ms Store the current buffer in the host terminal's selection (clipboard). See the set-clipboard option above and the xterm(1) man page.

CONTROL MODE

In control mode, a client sends tmux commands or command sequences terminated by newlines on standard input. Each command will produce one block of output on standard output. An output block consists of a %begin line followed by the output (which may be empty). The output block ends with a %end or %error %begin and matching %end or %error have two arguments: an integer time (as seconds from epoch) and command number. For example:

%begin 1363006971 2
0: ksh* (1 panes) [80x24] [layout b25f,80x24,0,0,2] @2 (active)
%end 1363006971 2

The refresh-client -C command may be used to set the size of a client in control mode.

In control mode, tmux outputs notifications. A notification will never occur inside an output block.

The following notifications are defined:

%client-session-changed client session-id name

The client is now attached to the session with ID session-id which is named name

%exit [reason ]

The tmux client is exiting immediately, either because it is not attached to any session or an error occurred. If present, reason describes why the client exited.

%layout-change window-id window-layout window-visible-layout window-flags

The layout of a window with ID window-id changed. The new layout is window-layout The window's visible layout is window-visible-layout and the window flags are window-flags

%output pane-id value

A window pane produced output. value escapes non-printable characters and backslash as octal \xxx.

%pane-mode-changed pane-id

The pane with ID pane-id has changed mode.

%session-changed session-id name

The client is now attached to the session with ID session-id which is named name

%session-renamed name

The current session was renamed to name

%session-window-changed session-id window-id

The session with ID session-id changed its active window to the window with ID window-id

%sessions-changed

A session was created or destroyed.

%unlinked-window-add window-id

The window with ID window-id was created but is not linked to the current session.

%window-add window-id

The window with ID window-id was linked to the current session.

%window-close window-id

The window with ID window-id closed.

%window-pane-changed window-id pane-id

The active pane in the window with ID window-id changed to the pane with ID pane-id

%window-renamed window-id name

The window with ID window-id was renamed to name

ENVIRONMENT

EDITOR

If the command specified in this variable contains the string `vi' and VISUAL is unset, use vi-style key bindings. Overridden by the mode-keys and status-keys options.

HOME

The user's login directory. If unset, the passwd(5) database is consulted.

LC_CTYPE

The character encoding locale(1). It is used for two separate purposes. For output to the terminal, UTF-8 is used if the -u option is given or if LC_CTYPE contains Qq UTF-8 or Qq UTF8 . Otherwise, only ASCII characters are written and non-ASCII characters are replaced with underscores (`_' ) For input, tmux always runs with a UTF-8 locale. If en_US.UTF-8 is provided by the operating system it is used and LC_CTYPE is ignored for input. Otherwise, LC_CTYPE tells tmux what the UTF-8 locale is called on the current system. If the locale specified by LC_CTYPE is not available or is not a UTF-8 locale, tmux exits with an error message.

LC_TIME

The date and time format locale(1). It is used for locale-dependent strftime(3) format specifiers.

PWD

The current working directory to be set in the global environment. This may be useful if it contains symbolic links. If the value of the variable does not match the current working directory, the variable is ignored and the result of getcwd(3) is used instead.

SHELL

The absolute path to the default shell for new windows. See the default-shell option for details.

TMUX_TMPDIR

The parent directory of the directory containing the server sockets. See the -L option for details.

VISUAL

If the command specified in this variable contains the string `vi' , use vi-style key bindings. Overridden by the mode-keys and status-keys options.

FILES

~/.tmux.conf

Default tmux configuration file.

/etc/tmux.conf

System-wide configuration file.

EXAMPLES

$ tmux new-session vi

Most commands have a shorter form, known as an alias. For new-session, this is new

$ tmux new vi

Alternatively, the shortest unambiguous form of a command is accepted. If there are several options, they are listed:

$ tmux n
ambiguous command: n, could be: new-session, new-window, next-window

Within an active session, a new window may be created by typing `C-b' c (Ctrl followed by the `b' key followed by the `c' key).

Windows may be navigated with: `C-b' 0 (to select window 0), `C-b' 1 (to select window 1), and so on; `C-b' n to select the next window; and `C-b' p to select the previous window.

A session may be detached using `C-b' d (or by an external event such as ssh(1) disconnection) and reattached with:

$ tmux attach-session

Typing `C-b' ? lists the current key bindings in the current window; up and down may be used to navigate the list or `q' to exit from it.

Commands to be run when the tmux server is started may be placed in the ~/.tmux.conf configuration file. Common examples include:

Changing the default prefix key:

set-option -g prefix C-a
unbind-key C-b
bind-key C-a send-prefix

Turning the status line off, or changing its colour:

set-option -g status off
set-option -g status-style bg=blue

Setting other options, such as the default command, or locking after 30 minutes of inactivity:

set-option -g default-command "exec /bin/ksh"
set-option -g lock-after-time 1800

Creating new key bindings:

bind-key b set-option status
bind-key / command-prompt "split-window 'exec man %%'"
bind-key S command-prompt "new-window -n %1 'ssh %1'"

SEE ALSO

AUTHORS