Manual Reference Pages  - unique (1m_uuid)

NAME
unique(1f) - [FUNIX] generate a UUID (Universally Unique ID) string per RFC 4122 (LICENSE:PD)

CONTENTS

Synopsis
Description
Options
Examples
Author
License

SYNOPSIS
unique [[ --method] NAME][ -urn][ -repeat N]]|[ --help|--version]

DESCRIPTION
unique(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. The default
5. Not implemented
--urn The output is prefixed with "urn:uuid:". This conforms to RFC 4122, which defines a Uniform Resource Name (URN) namespace for UUIDs.
--repeat N
  Number of UUID strings to generate
--help display this help and exit
--version
  output version information and exit

EXAMPLES
Sample commands 

   unique
   4bb8051e-4af3-11e8-6603-4254ffee9a14


   unique --urn
   urn:uuid:e9fd7cab-69f2-4cd6-4b5e-d54b9fbf617a


   unique --method time --repeat 4
   f2a2faf0-833a-11e9-7373-5eb4cfd7e237
   f2a2faf0-833a-11e9-7373-afbb9f7b9100
   f2a2faf0-833a-11e9-7373-cde3ffff3681
   f2a2faf0-833a-11e9-7373-271cfbfd42bc


   unique --usage # show usage, including short names
   USAGE:
   Keyword  Short Present Value
   help        h  F        [F]
   method      m  F        ["4"]
   repeat      r  F        [1]
   urn         U  F        [F]
   usage       u  T        [T]
   verbose     V  F        [F]
   version     v  F        [F]


   unique -r 2 -m 1 -U
   urn:uuid:91c6a054-26df-11ee-5779-c946fe995111
   urn:uuid:91c6a054-26df-11ee-5779-62307afd65fd

AUTHOR
John S. Urban

LICENSE
Public Domain

Nemo Release 3.1 unique (1m_uuid) August 29, 2024
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