To disable the user list and guest user login in Ubuntu 16.04 LTS login screen, open a terminal window and do the following: $ cd /etc/lightdm <enter> $ sudo mkdir lightdm.conf.d <enter> $ sudo cd lightdm.conf.d <enter> $ sudo mousepad 50-config.conf <enter> Enter the text below into the file. [SeatDefaults] greeter-hide-users=true greeter-show-manual-login=true allow-guest=false Save the … Continue reading How to disable user list and guest user login in Ubuntu 16.04 LTS →