Man Pages

uuidgen(1) - phpMan uuidgen(1) - phpMan

Command: man perldoc info search(apropos)  


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  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.  Other-
       wise,  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 eth-
              ernet 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.ker-
       nel.org/pub/linux/utils/util-linux-ng/.

SEE ALSO
       libuuid(3)



Linux                              May 2009                         UUIDGEN(1)