UUIDGEN(1)                                                                                                            UUIDGEN(1)



NAME
       uuidgen - command-line utility to create a new UUID value

SYNOPSIS
       uuidgen [-r|-t]

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 number generator is present.  Otherwise, it will chose 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     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     Generate a time-based UUID.  This method creates a UUID based on the system clock plus the system's ethernet hard-
              ware address, if present.

CONFORMING TO
       OSF DCE 1.1

AUTHOR
       uuidgen was written by Andreas Dilger for libuuid.

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

SEE ALSO
       libuuid(3)



Linux                                                       May 2009                                                  UUIDGEN(1)