UUIDD(8) System Administration UUIDD(8)
uuidd - UUID generation daemon
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 <email@example.com>.
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 firstname.lastname@example.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 2020-05-27. (At that time, the date of the most recent commit that was found in the repository was 2020-05-27.) 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 email@example.com util-linux July 2014 UUIDD(8)
Pages that refer to this page: uuid_generate(3)