uuidgen(1)

1UUIDGEN(1)                       User Commands                      UUIDGEN(1)
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NAME

6       uuidgen - create a new UUID value
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SYNOPSIS

9       uuidgen [options]
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DESCRIPTION

12       The uuidgen program creates (and prints) a new universally unique iden‐
13       tifier (UUID) using the libuuid(3) library.  The new UUID  can  reason‐
14       ably  be considered unique among all UUIDs created on the local system,
15       and among UUIDs created on other systems in the past and in the future.
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17       There are two types of UUIDs which  uuidgen  can  generate:  time-based
18       UUIDs  and random-based UUIDs.  By default uuidgen will generate a ran‐
19       dom-based UUID if a high-quality random number  generator  is  present.
20       Otherwise,  it  will choose a time-based UUID.  It is possible to force
21       the generation of one of these two UUID types by using  the  -r  or  -t
22       options.
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OPTIONS

25       -r, --random
26              Generate  a  random-based UUID.  This method creates a UUID con‐
27              sisting mostly of random bits.  It requires that  the  operating
28              system  have  a  high  quality  random number generator, such as
29              /dev/random.
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31       -t, --time
32              Generate a time-based UUID.  This method creates a UUID based on
33              the system clock plus the system's ethernet hardware address, if
34              present.
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36       -h, --help
37              Display help text and exit.
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39       -V, --version
40              Display version information and exit.
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CONFORMING TO

43       OSF DCE 1.1
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AUTHOR

46       uuidgen was written by Andreas Dilger for libuuid.
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AVAILABILITY

52       The uuidgen command is part of the util-linux package and is  available
53       from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
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57util-linux                         June 2011                        UUIDGEN(1)