I’m using 16.04LTS for my main OS right now. I just try install 18.04 Bionic Beaver on VM. I can’t seem to be able to install “gravekey_0.0.1_precise_all.deb” anymore. It doesn’t seem to work on this new version of Mate.
Is There anyway that I can change or add setting that let me “Switch to another keyboard layout” using “Grave key” (~)
to install 3rd party .deb packages, first install "Software" using the software boutique and then set it as default for .deb packages, it should then install no problem!. (I had problems with Google Earth/Browser and Skype for Linux .debs myself).