LinuxSystem ControlLinuxLock screen gnome-screensaver-command -l Lock screen (alternative) dbus-send --type=method_call --dest=org.freedesktop.ScreenSaver /ScreenSaver org.freedesktop.ScreenSaver.Lock Unlock screen gnome-screensaver-command -a Unlock screen (alternative) dbus-send --type=method_call --dest=org.freedesktop.ScreenSaver /ScreenSaver org.freedesktop.ScreenSaver.SetActive boolean:false Reboot the system reboot Reboot the system (alternative) shutdown -r Shutdown the system poweroff Shutdown the system (alternative) shutdown -h now Shutdown the system (another alternative) reboot -p Shutdown the system at specific time shutdown -h 18:45 "Server is going down for maintenance" Stop Bluetooth service service bluetooth stop Start Bluetooth service service bluetooth start Stop Wi-Fi service nmcli nm wifi off Start Wi-Fi service nmcli nm wifi on Turn off monitor xset dpms force offPreviousSystem InformationNextUsers and Groups