1UUIDD(8)                     System Administration                    UUIDD(8)
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NAME

6       uuidd - UUID generation daemon
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SYNOPSIS

9       uuidd [options]
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DESCRIPTION

12       The  uuidd  daemon  is used by the UUID library to generate universally
13       unique identifiers (UUIDs), especially time-based UUIDs,  in  a  secure
14       and  guaranteed-unique  fashion,  even  in the face of large numbers of
15       threads running on different CPUs trying to grab UUIDs.
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OPTIONS

18       -d, --debug
19              Run uuidd in debugging mode.  This prevents uuidd  from  running
20              as a daemon.
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22       -F, --no-fork
23              Do not daemonize using a double-fork.
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25       -k, --kill
26              If currently a uuidd daemon is running, kill it.
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28       -n, --uuids number
29              When  issuing  a test request to a running uuidd, request a bulk
30              response of number UUIDs.
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32       -P, --no-pid
33              Do not create a pid file.
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35       -p, --pid path
36              Specify the pathname where the pid file should be  written.   By
37              default, the pid file is written to /run/uuidd/uuidd.pid.
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39       -q, --quiet
40              Suppress some failure messages.
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42       -r, --random
43              Test  uuidd  by  trying to connect to a running uuidd daemon and
44              request it to return a random-based UUID.
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46       -S, --socket-activation
47              Do not create a socket but instead expect it to be  provided  by
48              the calling process.  This implies --no-fork and --no-pid.  This
49              option is intended to be used only with systemd(1).  It needs to
50              be enabled with a configure option.
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52       -s, --socket path
53              Make  uuidd  use  this  pathname for the unix-domain socket.  By
54              default, the pathname used is /run/uuidd/request.   This  option
55              is primarily for debugging purposes, since the pathname is hard-
56              coded in the libuuid library.
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58       -T, --timeout number
59              Make uuidd exit after number seconds of inactivity.
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61       -t, --time
62              Test uuidd by trying to connect to a running  uuidd  daemon  and
63              request it to return a time-based UUID.
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65       -V, --version
66              Output version information and exit.
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68       -h, --help
69              Display help screen and exit.
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EXAMPLE

72       Start up a daemon, print 42 random keys, and then stop the daemon:
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74              uuidd -p /tmp/uuidd.pid -s /tmp/uuidd.socket
75              uuidd -d -r -n 42 -s /tmp/uuidd.socket
76              uuidd -d -k -s /tmp/uuidd.socket
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AUTHOR

79       The uuidd daemon was written by Theodore Ts'o <tytso@mit.edu>.
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SEE ALSO

82       uuid(3), uuidgen(1)
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AVAILABILITY

85       The  uuidd  daemon  is  part of the util-linux package and is available
86       from the Linux Kernel  Archive  ⟨https://www.kernel.org/pub/linux/utils
87       /util-linux/⟩.
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91util-linux                         July 2014                          UUIDD(8)
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