systemctl-help: add page (#18644)

Co-authored-by: Dylan <145150333+dmmqz@users.noreply.github.com> Co-authored-by: Managor <42655600+Managor@users.noreply.github.com>
2026-08-28 20:11:19 +08:00 · 2025-10-14 03:30:51 +02:00
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+# systemctl help
+
+> Show the manual pages for one or more units, or for the unit a process belongs to (by PID).
+> More information: <https://www.freedesktop.org/software/systemd/man/systemctl.html#help%20PATTERN%E2%80%A6%7CPID%E2%80%A6>.
+
+- Show the manual page for a specific unit:
+
+`systemctl help {{unit}}`
+
+- Show the manual pages for multiple units:
+
+`systemctl help {{unit1 unit2 ...}}`
+
+- Show the manual page for a user unit:
+
+`systemctl help {{unit}} --user`
+
+- Show the manual page without a pager (all at once):
+
+`systemctl help {{unit}} --no-pager`
+
+- Show the manual page for the unit of a process by PID:
+
+`systemctl help {{pid}}`