Thanks for your help. It got me to the right path towards the solution.
2. Solved. When I tried your way, my logging screen never loaded and I had to revert with tty6. After a quick search I found the answer:
create a folder and a conf file sudo mkdir -p /etc/lightdm/lightdm.conf.d sudo nano /etc/lightdm/lightdm.conf.d/50-my-custom-config.conf add the following to the conf file to hide the user list [SeatDefaults] greeter-hide-users=true greeter-show-manual-login=true You can also add the following to hide the guest session allow-guest=false Now it works just as I want it to.
