Lock screen from command line

[deadtom]

I want to be able to lock the screen on my PC remotely, via ssh.

All of the information that google has turned up is outdated or just doesn't work.

Can anyone tell me how this can be accomplished?

[SteveRiley]

Does this work?

DISPLAY=:0 qdbus org.freedesktop.ScreenSaver /org/freedesktop/ScreenSaver org.freedesktop.ScreenSaver.Lock

Edit: tested here, works. On Kubuntu 15.04.

[deadtom]

Does this work?

Nope. That's the command I keep finding everywhere but this is what happens when I enter it:

Service 'org.freedesktop.ScreenSaver' does not exist.

[SteveRiley]

What's the output of

qdbus | egrep -i 'save|screen|lock'

[deadtom]

Ah, figured it out.

/usr/lib/kde4/libexec/kscreenlocker_greet --immediateLock

Works like a charm.

[SteveRiley]

Nice.

For 15.04 and greater, the binary is in a new location.

/usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet --help