1UUID(1) Universally Unique Identifier UUID(1)
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6 uuid - OSSP Universally Unique Identifier Command-Line Tool
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9 OSSP uuid 1.6.2 (04-Jul-2008)
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12 uuid [-v version] [-m] [-n count] [-1] [-F format] [-o filename]
13 [namespace name]
14 uuid -d [-r] [-o filename] uuid
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18 OSSP uuid is a ISO-C:1999 application programming interface (API) and
19 corresponding command line interface (CLI) for the generation of DCE
20 1.1, ISO/IEC 11578:1996 and IETF RFC-4122 compliant Universally Unique
21 Identifier (UUID). It supports DCE 1.1 variant UUIDs of version 1 (time
22 and node based), version 3 (name based, MD5), version 4 (random number
23 based) and version 5 (name based, SHA-1). Additional API bindings are
24 provided for the languages ISO-C++:1998, Perl:5 and PHP:4/5. Optional
25 backward compatibility exists for the ISO-C DCE-1.1 and Perl Data::UUID
26 APIs.
27 UUIDs are 128 bit numbers which are intended to have a high likelihood
29 of uniqueness over space and time and are computationally difficult to
30 guess. They are globally unique identifiers which can be locally
31 generated without contacting a global registration authority. UUIDs are
32 intended as unique identifiers for both mass tagging objects with an
33 extremely short lifetime and to reliably identifying very persistent
34 objects across a network.
35 This is the command line interface (CLI) of OSSP uuid. For a detailed
37 description of UUIDs see the documentation of the application
38 programming interface (API) in uuid(3).
39
41 -v version
42 Sets the version of the generated DCE 1.1 variant UUID. Supported
43 are version "1", "3", "4" and "5". The default is "1".
44 For version 3 and version 5 UUIDs the additional command line
46 arguments namespace and name have to be given. The namespace is
47 either a UUID in string representation or an identifier for
48 internally pre-defined namespace UUIDs (currently known are
49 "ns:DNS", "ns:URL", "ns:OID", and "ns:X500"). The name is a string
50 of arbitrary length.
51 -m Forces the use of a random multi-cast MAC address when generating
53 version 1 UUIDs. By default the real physical MAC address of the
54 system is used.
55 -n count
57 Generate count UUIDs instead of just a single one (the default).
58 -1 If option -n is used with a count greater than 1, then this option
60 can enforce the reset the UUID context for each generated UUID.
61 This makes no difference for version 3, 4 and 5 UUIDs. But version 1
62 UUIDs are based on the previously generated UUID which is remembered
63 in the UUID context of the API. Option -1 deletes the remembered
64 UUID on each iteration.
65 -F format
67 Representation format for importing or exporting an UUID. The
68 following (case insensitive) format identifiers are currently
69 recognized:
70 BIN (binary representation)
72 This is the raw 128 bit network byte order binary representation
73 of a UUID. Example is the octet stream 0xF8 0x1D 0x4F 0xAE 0x7D
74 0xEC 0x11 0xD0 0xA7 0x65 0x00 0xA0 0xC9 0x1E 0x6B 0xF6.
75 STR (string representation)
77 This is the 36 character hexadecimal ASCII string representation
78 of a UUID. Example is the string
79 "f81d4fae-7dec-11d0-a765-00a0c91e6bf6".
80 SIV (single integer value representation)
82 This is the maximum 39 character long single integer value
83 representation of a UUID. Example is the string
84 "329800735698586629295641978511506172918".
85 -o filename
87 Write output to filename instead of to stdout.
88 -d Decode a given UUID (given as a command line argument or if the
90 command line argument is "-" the UUID is read from stdin) and dump
91 textual information about the UUID.
92
94 # generate DCE 1.1 v1 UUID (time and node based)
95 $ uuid -v1
96 01c47915-4777-11d8-bc70-0090272ff725
97 # decode and dump DCE 1.1 v1 UUID (time and node based)
99 $ uuid -d 01c47915-4777-11d8-bc70-0090272ff725
100 encode: STR: 01c47915-4777-11d8-bc70-0090272ff725
101 SIV: 2349374037528578887923094374772111141
102 decode: variant: DCE 1.1, ISO/IEC 11578:1996
103 version: 1 (time and node based)
104 content: time: 2004-01-15 16:22:26.376322.1 UTC
105 clock: 15472 (usually random)
106 node: 00:90:27:2f:f7:25 (global unicast)
107 # generate DCE 1.1 v3 UUID (name based)
109 $ uuid -v3 ns:URL http://www.ossp.org/
110 02d9e6d5-9467-382e-8f9b-9300a64ac3cd
111 # decode and dump DCE 1.1 v3 UUID (name based)
113 $ uuid -d 02d9e6d5-9467-382e-8f9b-9300a64ac3cd
114 encode: STR: 02d9e6d5-9467-382e-8f9b-9300a64ac3cd
115 SIV: 3789866285607910888100818383505376205
116 decode: variant: DCE 1.1, ISO/IEC 11578:1996
117 version: 3 (name based, MD5)
118 content: 02:D9:E6:D5:94:67:08:2E:0F:9B:93:00:A6:4A:C3:CD
119 (not decipherable: MD5 message digest only)
120 # generate DCE 1.1 v4 UUID 4 (random data based)
122 $ uuid -v4
123 eb424026-6f54-4ef8-a4d0-bb658a1fc6cf
124 # decode and dump DCE 1.1 v4 UUID 4 (random data based)
126 $ uuid -d eb424026-6f54-4ef8-a4d0-bb658a1fc6cf
127 encode: STR: eb424026-6f54-4ef8-a4d0-bb658a1fc6cf
128 SIV: 312712571721458096795100956955942831823
129 decode: variant: DCE 1.1, ISO/IEC 11578:1996
130 version: 4 (random data based)
131 content: EB:42:40:26:6F:54:0E:F8:24:D0:BB:65:8A:1F:C6:CF
132 (no semantics: random data only)
133
135 uuid(3), OSSP::uuid(3).
13604-Jul-2008 OSSP uuid 1.6.2 UUID(1)