System control

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