uuidgen - create a new UUID value
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
choose a time-based UUID. It is possible to force the generation of one of
these two UUID types by using the -r
- -r, --random
- 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
- -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
- -h, --help
- Display help text and exit.
- -V, --version
- Display version information and exit.
OSF DCE 1.1
was written by Andreas Dilger for libuuid.
The uuidgen command is part of the util-linux package and is available from