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 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.
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 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 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 firstname.lastname@example.org systemd 245 SYSTEMD-ID128(1)
Pages that refer to this page: sd-id128(3), sd_id128_const_str(3), SD_ID128_CONST_STR(3), sd_id128_equal(3), sd_id128_format_str(3), SD_ID128_FORMAT_STR(3), sd_id128_format_val(3), SD_ID128_FORMAT_VAL(3), sd_id128_get_boot(3), sd_id128_get_boot_app_specific(3), sd_id128_get_invocation(3), sd_id128_get_machine(3), sd_id128_get_machine_app_specific(3), sd_id128_is_null(3), sd_id128_make(3), SD_ID128_MAKE(3), sd_id128_make_str(3), SD_ID128_MAKE_STR(3), sd_id128_null(3), SD_ID128_NULL(3), sd_id128_randomize(3), sd_id128_t(3), sd_id128_uuid_format_str(3), SD_ID128_UUID_FORMAT_STR(3), 30-systemd-environment-d-generator(7), systemd.directives(7), systemd.index(7)