loginctl: add page (#9188)

pages/linux/loginctl.md

@@ -0,0 +1,24 @@
+# loginctl
+
+> Manage the systemd login manager.
+> More information: <https://www.freedesktop.org/software/systemd/man/loginctl.html>.
+
+- Print all current sessions:
+
+`loginctl list-sessions`
+
+- Print all properties of a specific session:
+
+`loginctl show-session {{session_id}} --all`
+
+- Print all properties of a specific user:
+
+`loginctl show-user {{username}}`
+
+- Print a specific property of a user:
+
+`loginctl show-user {{username}} --property={{property_name}}`
+
+- Execute a `loginctl` operation on a remote host:
+
+`loginctl list-users -H {{hostname}}`