tldr/pages/linux/systemd-id128.md

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# systemd-id128
> Generate and print sd-128 identifiers.
> More information: <https://www.freedesktop.org/software/systemd/man/systemd-id128.html>.
- Generate a new random identifier:
`systemd-id128 new`
- Print the identifier of the current machine:
`systemd-id128 machine-id`
- Print the identifier of the current boot:
`systemd-id128 boot-id`
- Print the identifier of the current service invocation (this is available in systemd services):
`systemd-id128 invocation-id`
- Generate a new random identifier and print it as an UUID (five groups of digits separated by hyphens):
`systemd-id128 new --uuid`