1 .\" Copyright 1999 Andreas Dilger (adilger@enel.ucalgary.ca)
3 .\" This man page was created for libuuid.so.1.1 from e2fsprogs-1.14.
5 .\" This file may be copied under the terms of the GNU Public License.
7 .\" Created Wed Mar 10 17:42:12 1999, Andreas Dilger
8 .TH UUIDGEN 1 "May 2009" "Linux"
10 uuidgen \- command\-line utility to create a new UUID value
17 program creates (and prints)
18 a new universally unique identifier (UUID) using the
20 library. The new UUID can reasonably be considered unique among
21 all UUIDs created on the local system,
22 and among UUIDs created on other systems in the past
25 There are two types of UUID's which
27 can generate: time-based UUID's and random-based UUID's. By
30 will generate a random-based UUID if a high-quality random number
31 generator is present. Otherwise, it will chose a time-based UUID. It
32 is possible to force the generation of one of these two
33 UUID types by using the
41 Generate a random-based UUID. This method creates a UUID consisting mostly
42 of random bits. It requires that the operating system have a high
43 quality random number generator, such as
47 Generate a time-based UUID. This method creates a UUID based on the system
48 clock plus the system's ethernet hardware address, if present.
53 was written by Andreas Dilger for libuuid.
55 The uuidgen command is part of the util-linux-ng package and is available from
56 ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.