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.
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)