1SYSTEMD-ID128(1)                 systemd-id128                SYSTEMD-ID128(1)
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NAME

6       systemd-id128 - Generate and print sd-128 identifiers
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SYNOPSIS

9       systemd-id128 [OPTIONS...] new
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11       systemd-id128 [OPTIONS...] machine-id
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13       systemd-id128 [OPTIONS...] boot-id
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15       systemd-id128 [OPTIONS...] invocation-id
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DESCRIPTION

18       id128 may be used to conveniently print sd-id128(3) UUIDs. What
19       identifier is printed depends on the specific verb.
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21       With new, a new random identifier will be generated.
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23       With machine-id, the identifier of the current machine will be printed.
24       See machine-id(5).
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26       With boot-id, the identifier of the current boot will be printed.
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28       Both machine-id and boot-id may be combined with the
29       --app-specific=app-id switch to generate application-specific IDs. See
30       sd_id128_get_machine(3) for the discussion when this is useful.
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32       With invocation-id, the identifier of the current service invocation
33       will be printed. This is available in systemd services. See
34       systemd.exec(5).
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36       With show, well-known IDs are printed (for now, only GPT partition type
37       UUIDs), along with brief identifier strings. When no arguments are
38       specified, all known IDs are shown. When arguments are specified, they
39       must be the identifiers or ID values of one or more known IDs, which
40       are then printed. Combine with --uuid to list the IDs in UUID style,
41       i.e. the way GPT partition type UUIDs are usually shown.
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OPTIONS

44       The following options are understood:
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46       -p, --pretty
47           Generate output as programming language snippets.
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49       -a app-id, --app-specific=app-id
50           With this option, an identifier that is the result of hashing the
51           application identifier app-id and the machine identifier will be
52           printed. The app-id argument must be a valid sd-id128 string
53           identifying the application.
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55       -u, --uuid
56           Generate output as an UUID formatted in the "canonical
57           representation", with five groups of digits separated by hyphens.
58           See the wikipedia[1] for more discussion.
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60       -h, --help
61           Print a short help text and exit.
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63       --version
64           Print a short version string and exit.
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EXIT STATUS

67       On success, 0 is returned, a non-zero failure code otherwise.
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SEE ALSO

70       systemd(1), sd-id128(3), sd_id128_get_machine(3)
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NOTES

73        1. wikipedia
74           https://en.wikipedia.org/wiki/Universally_unique_identifier#Format
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78systemd 251                                                   SYSTEMD-ID128(1)
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