How do I fix the GPG error “NO_PUBKEY”?

By far the simplest way to handle this now is with Y-PPA-Manager (which now integrates the launchpad-getkeys script with a graphical interface). To install it, first add the webupd8 repository for this program: sudo add-apt-repository...

Touchpad settings not found for LUbuntu 18.04

It appears that gpointing-device-settings was removed possibly due to never being finished and debugged. In any case, I found touchpad-indicator (site is in Spanish, but Google translated it for me pretty good), also with the code here. I installed it using: sudo...