UUIDD
Section: System Administration (8)
Updated: July 2014
Page Index
NAME
uuidd - UUID generation daemon
SYNOPSIS
uuidd
[options]
DESCRIPTION
The
uuidd
daemon is used by the UUID library to generate
universally unique identifiers (UUIDs), especially time-based UUIDs,
in a secure and guaranteed-unique fashion, even in the face of large
numbers of threads running on different CPUs trying to grab UUIDs.
OPTIONS
- -d, --debug
-
Run uuidd in debugging mode. This prevents uuidd from running as a daemon.
- -F, --no-fork
-
Do not daemonize using a double-fork.
- -k, --kill
-
If currently a uuidd daemon is running, kill it.
- -n, --uuids number
-
When issuing a test request to a running uuidd, request a bulk response
of
number
UUIDs.
- -P, --no-pid
-
Do not create a pid file.
- -p, --pid path
-
Specify the pathname where the pid file should be written. By default,
the pid file is written to /run/uuidd/uuidd.pid.
- -q, --quiet
-
Suppress some failure messages.
- -r, --random
-
Test uuidd by trying to connect to a running uuidd daemon and
request it to return a random-based UUID.
- -S, --socket-activation
-
Do not create a socket but instead expect it to be provided by the calling
process. This implies --no-fork and --no-pid. This option is
intended to be used only with systemd(1). It needs to be enabled with
a configure option.
- -s, --socket path
-
Make uuidd use this pathname for the unix-domain socket. By default, the
pathname used is /run/uuidd/request. This option is primarily
for debugging purposes, since the pathname is hard-coded in the libuuid
library.
- -T, --timeout number
-
Make uuidd exit after number seconds of inactivity.
- -t, --time
-
Test uuidd by trying to connect to a running uuidd daemon and
request it to return a time-based UUID.
- -V, --version
-
Output version information and exit.
- -h, --help
-
Display help screen and exit.
EXAMPLE
Start up a daemon, print 42 random keys, and then stop the daemon:
-
uuidd -p /tmp/uuidd.pid -s /tmp/uuidd.socket
uuidd -d -r -n 42 -s /tmp/uuidd.socket
uuidd -d -k -s /tmp/uuidd.socket
AUTHOR
The
uuidd
daemon was written by Theodore Ts'o <
tytso@mit.edu>.
SEE ALSO
uuid(3),
uuidgen(1)
AVAILABILITY
The uuidd daemon is part of the util-linux package and is available from the
Linux Kernel Archive