To uninstall xtrlock just follow these instructions.
sudo apt-get remove xtrlock
This will remove just the xtrlock package itself.
sudo apt-get remove --auto-remove xtrlock
This will remove the xtrlock package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xtrlock then this will work.
sudo apt-get purge xtrlock
Or similarly, like this xtrlock
sudo apt-get purge --auto-remove xtrlock
|Maintainer||Matthew Vernon <email@example.com>|
|Description||Minimal X display lock program except the Xlib library. It doesn't obscure the screen, it is completely idle while the display is locked and you don't type at it, and it doesn't do funny things to the X access control lists.|