Lock Your Screen with Hotkeys in Lubuntu

You can bind the screensaver lock command to CTRL+ALT+L by editing your Lubuntu keyboard & mouse configuration file. In the terminal, paste:

leafpad ~/.config/openbox/lubuntu-rc.xml

Find a spot where you see a lot of "keybind" words. Directly after a </keybind >, paste the following block:

<keybind key="C-A-L">
    <action name="Execute">
    <command>xscreensaver-command -lock</command>
    </action>
</keybind>

It should look similar to this:

Again, in the terminal, type

openbox --reconfigure

for changes to take effect.

Source: r/Lubuntu

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