systemd-id128(1) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | SEE ALSO | NOTES | COLOPHON

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

NAME         top

       systemd-id128 - Generate and print sd-128 identifiers

SYNOPSIS         top

       systemd-id128 [OPTIONS...] new

       systemd-id128 [OPTIONS...] machine-id

       systemd-id128 [OPTIONS...] boot-id

       systemd-id128 [OPTIONS...] invocation-id

DESCRIPTION         top

       id128 may be used to conveniently print sd-id128(3) UUIDs. What
       identifier is printed depends on the specific verb.

       With new, a new random identifier will be generated.

       With machine-id, the identifier of the current machine will be
       printed. See machine-id(5).

       With boot-id, the identifier of the current boot will be printed.

       Both machine-id and boot-id may be combined with the
       --app-specific=app-id switch to generate application-specific IDs.
       See sd_id128_get_machine(3) for the discussion when this is useful.

       With invocation-id, the identifier of the current service invocation
       will be printed. This is available in systemd services. See
       systemd.exec(5).

       With show, well-known UUIDs are printed. When no arguments are
       specified, all known UUIDs are shown. When arguments are specified,
       they must be the names or values of one or more known UUIDs, which
       are then printed.

OPTIONS         top

       The following options are understood:

       -p, --pretty
           Generate output as programming language snippets.

       -a app-id, --app-specific=app-id
           With this option, an identifier that is the result of hashing the
           application identifier app-id and the machine identifier will be
           printed. The app-id argument must be a valid sd-id128 string
           identifying the application.

       -u, --uuid
           Generate output as an UUID formatted in the "canonical
           representation", with five groups of digits separated by hyphens.
           See the wikipedia[1] for more discussion.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

EXIT STATUS         top

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

SEE ALSO         top

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

NOTES         top

        1. wikipedia
           https://en.wikipedia.org/wiki/Universally_unique_identifier#Format

COLOPHON         top

       This page is part of the systemd (systemd system and service manager)
       project.  Information about the project can be found at 
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have a bug
       report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.  This
       page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2020-06-09.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-06-09.)  If you discover any rendering problems in
       this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to man-pages@man7.org

systemd 245                                                 SYSTEMD-ID128(1)

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