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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLE | AUTHOR | SEE ALSO | AVAILABILITY | COLOPHON |
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UUIDD(8) System Administration UUIDD(8)
uuidd - UUID generation daemon
uuidd [options]
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.
-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.
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
The uuidd daemon was written by Theodore Ts'o <tytso@mit.edu>.
uuid(3), uuidgen(1)
The uuidd daemon is part of the util-linux package and is available
from the Linux Kernel Archive
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2018-02-02. (At that time, the date of the most recent commit that
was found in the repository was 2018-02-01.) If you discover any
rendering problems in this HTML version of the page, or you believe
there is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
util-linux July 2014 UUIDD(8)
Pages that refer to this page: uuid_generate(3)
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