systemctl-status: add page (#17637)

* Create systemctl-status.md

---------

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/linux/systemctl-status.md

@@ -0,0 +1,28 @@
+# systemctl status
+
+> Display the status of systemd units.
+> More information: <https://www.freedesktop.org/software/systemd/man/latest/systemctl.html#status%20PATTERN%E2%80%A6%7CPID%E2%80%A6%5D>.
+
+- Show the status of a systemd unit:
+
+`systemctl status {{unit}}.{{service|timer|socket|target|...}}`
+
+- Show the status of failed units:
+
+`systemctl status --failed`
+
+- List all running services:
+
+`systemctl status`
+
+- List all units in the system:
+
+`systemctl status --all`
+
+- List all units of a specific type:
+
+`systemctl status --type {{service|timer|socket|target|...}}`
+
+- List all units with a specific state:
+
+`systemctl status --state {{active|inactive|failed}}`