Linux: Read sysctemctl services (KB)

systemctl may be used to introspect and control the state of the 'systemd' system and service manager. Please refer to systemd for an introduction into the basic concepts and functionality this tool manages. list-units: List units that systemd currently has in memory. This includes units that are either referenced directly or through a dependency, units that are pinned by applications programmatically, or units that were active in the past and have failed. By default only units which are active, have pending jobs, or have failed are shown. Note: This script only stores information for other Policy Controls.