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UUIDGEN(1) General Commands Manual UUIDGEN(1) NAME uuidgen - command-line utility to create a new UUID value SYNOPSIS uuidgen [ -r | -t ] DESCRIPTION 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 op- tions. OPTIONS -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 /dev/random. -t Generate a time-based UUID. This method creates a UUID based on the system clock plus the system's ethernet hardware address, if present. CONFORMING TO OSF DCE 1.1 AUTHOR uuidgen was written by Andreas Dilger for libuuid. AVAILABILITY uuidgen is part of libuuid from the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net. SEE ALSO libuuid(3) E2fsprogs version 1.47.2 January 2025 UUIDGEN(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONFORMING TO | AUTHOR | AVAILABILITY | SEE ALSO
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