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1 perry 1 UUIDGEN
2 !!!UUIDGEN
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 OPTIONS
7 RETURN VALUE
8 CONFORMING TO
9 AUTHOR
10 AVAILABILITY
11 SEE ALSO
12 ----
13 !!NAME
14
15
16 uuidgen - command-line utility to create a new UUID value
17 !!SYNOPSIS
18
19
20 __uuidgen__ [[ __-r__ | __-t__ ]
21 !!DESCRIPTION
22
23
24 The __uuidgen__ program creates a new universally unique
25 identifier (UUID) using the libuuid(3) library. The
26 new UUID can reasonably be considered unique among all UUIDs
27 created on the local system, and among UUIDs created on
28 other systems in the past and in the future.
29
30
31 There are two types of UUID's which __uuidgen__ can
32 generate: time-based UUID's and random-based UUID's. By
33 default __uuidgen__ will generate a random-based UUID if
34 a high-quality random number generator is present.
35 Otherwise, it will chose a time-based UUID. It is possible
36 to force the generation of one of these two UUID types by
37 using the __-r__ or __-t__ options.
38 !!OPTIONS
39
40
41 __-r__
42
43
44 Generate a random-based UUID. This method creates a UUID
45 consisting mostly of random bits. It requires that the
46 operating system have a high quality random number
47 generator, such as ''/dev/random''.
48
49
50 __-t__
51
52
53 Generate a time-based UUID. This method creates a UUID based
54 on the system clock plus the system's ethernet hardware
55 address, if present.
56 !!RETURN VALUE
57
58
59 The UUID of the form 1b4e28ba-2fa1-11d2-883f-b9a761bde3fb
60 (in printf(3) format
61 __
62 !!CONFORMING TO
63
64
65 OSF DCE 1.1
66 !!AUTHOR
67
68
69 __uuidgen__ was written by Andreas Dilger for
70 libuuid.
71 !!AVAILABILITY
72
73
74 __uuidgen__ is part of libuuid from the e2fsprogs package
75 and is available from
76 http://e2fsprogs.sourceforge.net.
77 !!SEE ALSO
78
79
80 libuuid(3)
81 ----
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