I can't seem to get what is described in this thread to work... I even tried entering the command into the terminal, but all I get is command not found.
I have also tried the startup applications method as described in the same thread, but that only results in an error occurring upon boot along with ubuntu wanting to send a report on it.
The lock button up to the right functions as intended though, so I'm guessing things have changed since the referred to post was made. Does anyone here happen to know how to solve this issue?
Update: Did as instructed by one of the subcomments and installed gnome-screensaver (and it still doesn't work).
Update 2: Uninstalled gnome-screensaver since xdg is apparently what handles the lock screen by default. xdg-screensaver lock works from terminal, but not from startup applications.
What am I doing wrong?