Upgraded from 16.04 to 18.04 but I really don’t like the Gnome environment. Sought advice via best things to do after installing 18.04 and followed the instructions to put the Mate desktop in its place. The problem started when I wasn’t presented with the option to select lightdm as the boot selection. When I boot the Mate logo appears but it still shows the Gnome desktop. I’ve tried to get it to change but it has resisted my efforts.
What I see on start up now is:
Error found when loading /etc/profile: