OnActiveSec= , OnBootSec= , OnStartupSec= , OnUnitActiveSec= and OnUnitInactiveSec= in systemd.timer (5) for details. These options are shortcuts ... starting the specified command…timers. You may find details in systemd.timer (5). 8.Swap units are very similar to mountsame input as the OnCalendar= setting in systemd.timer (5), following the syntax described in systemd.timeused and --what=state is selected, see systemd.timer (5). This command only applies to unitsabove mentioned files. For more details, see systemd.timer(5) . BACKGROUND MAINTENANCE ON MACOS SYSTEMS WhileNAME systemd-notifyNAME systemd-measure