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uuidgen -

UUIDGEN(1)                                User Commands                                UUIDGEN(1)

NAME
       uuidgen - create a new UUID value

SYNOPSIS
       uuidgen [options]

DESCRIPTION
       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 num‐
       ber 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
       -r, --random
              Generate a random-based UUID.  This method creates a UUID consisting mostly of ran‐
              dom 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
       OSF DCE 1.1

AUTHOR
       uuidgen was written by Andreas Dilger for libuuid.

SEE ALSO
       libuuid(3)

AVAILABILITY
       The uuidgen command is part of the util-linux package and is available from ftp://ftp.ker‐
       nel.org/pub/linux/utils/util-linux/.

util-linux                                  June 2011                                  UUIDGEN(1)

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