systemctl-set-property: add page (#19219)

Co-authored-by: Managor <[email protected]>

Author: TheRootDaemon

pages/linux/systemctl-set-property.md

@@ -0,0 +1,24 @@
+# systemctl set-property
+
+> Set the specified unit properties at runtime.
+> More information: <https://www.freedesktop.org/software/systemd/man/systemctl.html#set-property%20UNIT%20PROPERTY=VALUE%E2%80%A6>.
+
+- Set a property for a running service:
+
+`systemctl set-property {{unit}} {{property}}={{value}}`
+
+- Set multiple properties at once:
+
+`systemctl set-property {{unit}} {{property_1=value_1 property_2=value_2 ...}}`
+
+- Set a property only for the current runtime session (not persistent):
+
+`systemctl set-property {{unit}} {{property}}={{value}} --runtime`
+
+- Reset a property to its default value:
+
+`systemctl set-property {{unit}} {{property}}=`
+
+- Reset multiple properties to its default values:
+
+`systemctl set-property {{unit}} {{property_1= property_2= ...}}`