The uuidgen program creates (and prints) a new universally unique iden-
tifier (UUID) using the libuuid(3) library. The new UUID can reason-
ably 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
-r Generate a random-based UUID. This method creates a UUID con-
sisting mostly of random bits. It requires that the operating
system have a high quality random number generator, such as
-t Generate a time-based UUID. This method creates a UUID based on
the system clock plus the system's ethernet hardware address, if
OSF DCE 1.1
uuidgen was written by Andreas Dilger for libuuid.
The uuidgen command is part of the util-linux-ng package and is avail-
able from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
Linux May 2009 UUIDGEN(1)
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