Update cheatsheets

tldr/linux/systemctl-reload-or-restart

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# systemctl reload-or-restart
+
+> Reload `systemd` unit(s) otherwise restart them.
+> More information: <https://www.freedesktop.org/software/systemd/man/systemctl.html#reload-or-restart%20PATTERN%E2%80%A6>.
+
+- Reload or restart a unit:
+
+`systemctl reload-or-restart {{unit}}`
+
+- Reload or restart multiple units matching a pattern:
+
+`systemctl reload-or-restart {{pattern}}`
+
+- Run the command without waiting for the operation to complete:
+
+`systemctl reload-or-restart {{unit}} --no-block`
+
+- Apply the command only to user units:
+
+`systemctl reload-or-restart {{unit}} --user`