Section: User Commands (1)
Updated: September 2011
ul - do underlining
reads the named files (or standard input if none are given) and translates
occurrences of underscores to the sequence which indicates underlining for
the terminal in use, as specified by the environment variable
database is read to determine the appropriate sequences for underlining. If
the terminal is incapable of underlining but is capable of a standout mode,
then that is used instead. If the terminal can overstrike, or handles
If the terminal cannot underline, underlining is ignored.
- -i, --indicated
Underlining is indicated by a separate line containing appropriate dashes
`-'; this is useful when you want to look at the underlining which is
present in an
output stream on a crt-terminal.
- -t, -T, --terminal terminal
Override the environment variable
with the specified
- -V, --version
Display version information and exit.
- -h, --help
Display help text and exit.
The following environment variable is used:
variable is used to relate a tty device with its device capability
is set at login time, either by the default terminal type specified in
or as set during the login process by the user in their
command appeared in 3.0BSD.
usually outputs a series of backspaces and underlines intermixed with the
text to indicate underlining. No attempt is made to optimize the backward
The ul command is part of the util-linux package and is available from
Linux Kernel Archive