UUIDGEN(1)                      User Commands                     UUIDGEN(1)

NAME         top

       uuidgen - create a new UUID value

SYNOPSIS         top

       uuidgen [options]

DESCRIPTION         top

       The uuidgen program creates (and prints) a new universally unique
       identifier (UUID) using the libuuid(3) library.  The new UUID can
       reasonably be considered unique among all UUIDs created on the local
       system, and among UUIDs created on other systems in the past and in
       the future.

       There are two types of UUIDs which uuidgen can generate: time-based
       UUIDs and random-based UUIDs.  By default uuidgen will generate a
       random-based UUID if a high-quality random number generator is
       present.  Otherwise, it will choose a time-based UUID.  It is
       possible to force the generation of one of these two UUID types by
       using the -r or -t options.

OPTIONS         top

       -r, --random
              Generate a random-based UUID.  This method creates a UUID
              consisting mostly of random bits.  It requires that the
              operating system have a high quality random number generator,
              such as /dev/random.

       -t, --time
              Generate a time-based UUID.  This method creates a UUID based
              on the system clock plus the system's ethernet hardware
              address, if present.

       -h, --help
              Display help text and exit.

       -V, --version
              Display version information and exit.

CONFORMING TO         top

       OSF DCE 1.1

AUTHOR         top

       uuidgen was written by Andreas Dilger for libuuid.

SEE ALSO         top


AVAILABILITY         top

       The uuidgen command is part of the util-linux package and is
       available from

COLOPHON         top

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util-linux                        June 2011                       UUIDGEN(1)