Manual Reference Pages - _uuidgen (1)
NAME
_uuidgen(1f) - [FUNIX] generate a UUID (Universally Unique ID) string per RFC 4122 (LICENSE:PD)
CONTENTS
Synopsis
Description
Options
Examples
Author
License
SYNOPSIS
_uuidgen [[ --method NAME][ -urn][ -repeat N]]|[ --help|--version]
DESCRIPTION
_uuidgen(3f) generates UUID strings according to the RFC 4122 standard.A universally unique identifier (UUID) is a 128-bit number used to identify information in computer systems. When generated according to standard methods UUIDs are for practical purposes unique.
Standard methods 0,1, and 4 are supported as described in RFC 4122.
UUID strings are particularly useful as keys for relational database entries, and for building unique temporary file names (especially in cross-mounted filesystems that more than one OS is utilizing).
OPTIONS
--method NAME Select the UUID version type. Supported methods are nil|0, random|4, time|1.
0. Nil UUID (ie. ’00000000-0000-0000-0000-000000000000’) 1. time-based UUID 2. Not implemented 3. Not implemented 4. pseudo-RNG(Random Number Generator) based 5. Not implemented --urn RFC 4122 defines a Uniform Resource Name (URN) namespace for UUIDs. IE., the output is prefixed with "urn:uuid:". --repeat N Number of UUID strings to generate --help display this help and exit --version output version information and exit
EXAMPLES
Sample commands
_uuidgen 4bb8051e-4af3-11e8-6603-4254ffee9a14_uuidgen -urn urn:uuid:e9fd7cab-69f2-4cd6-4b5e-d54b9fbf617a
_uuidgen -method time -repeat 4 f2a2faf0-833a-11e9-7373-5eb4cfd7e237 f2a2faf0-833a-11e9-7373-afbb9f7b9100 f2a2faf0-833a-11e9-7373-cde3ffff3681 f2a2faf0-833a-11e9-7373-271cfbfd42bc
AUTHOR
John S. Urban
LICENSE
Public Domain
| _uuidgen (1) | November 14, 2020 |
