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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | SEE ALSO | NOTES | COLOPHON |
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SYSTEMD-ID128(1) systemd-id128 SYSTEMD-ID128(1)
systemd-id128 - Generate and print sd-128 identifiers
systemd-id128 [OPTIONS...] new
systemd-id128 [OPTIONS...] machine-id
systemd-id128 [OPTIONS...] boot-id
systemd-id128 [OPTIONS...] invocation-id
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 IDs are printed (for now, only GPT
partition type UUIDs), along with brief identifier strings. When
no arguments are specified, all known IDs are shown. When
arguments are specified, they must be the identifiers or ID
values of one or more known IDs, which are then printed. Combine
with --uuid to list the IDs in UUID style, i.e. the way GPT
partition type UUIDs are usually shown.
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.
On success, 0 is returned, a non-zero failure code otherwise.
systemd(1), sd-id128(3), sd_id128_get_machine(3)
1. wikipedia
https://en.wikipedia.org/wiki/Universally_unique_identifier#Format
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 2023-06-23. (At that
time, the date of the most recent commit that was found in the
repository was 2023-06-23.) 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 253 SYSTEMD-ID128(1)
Pages that refer to this page: sd-id128(3), sd_id128_get_machine(3), sd_id128_randomize(3), systemd.directives(7), systemd.index(7)
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HTML rendering created 2023-06-24 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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