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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 sys-
       tems in the past and in the future.

       There are two types of UUID's which uuidgen can  generate:  time-based  UUID's  and
       random-based  UUID's.   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 hardware 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)

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