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tldr/pages/linux/systemd-cat.md
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systemd-cat: add examples (#17754)
* systemd-cat: add examples
2025-08-25 19:17:42 -07:00

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# systemd-cat
> Connect a pipeline or program's output streams with the systemd journal.
> More information: <https://www.freedesktop.org/software/systemd/man/systemd-cat.html>.
- Write the output of the specified command to the journal (both output streams are captured):
`systemd-cat {{command}}`
- Write the output of a pipeline to the journal (`stderr` stays connected to the terminal):
`{{command}} | systemd-cat`
- Use the specified identifier (default: `cat` when reading from a pipeline, executable name otherwise):
`{{command}} | systemd-cat {{[-t|--identifier]}} {{id}}`
- Use the specified default priority level for all logged messages:
`systemd-cat {{[-p|--priority]}} {{emerg|alert|crit|err|warning|notice|info|debug}} {{command}}`
- Use the specified default priority level for the logged messages from the command's `stderr`:
`systemd-cat --stderr-priority {{emerg|alert|crit|err|warning|notice|info|debug}} {{command}}`