I'm a new Linux user and just installed Ubuntu, wanted to try other Desktop Environments however it didn't work. It only loads up with the Lubuntu logo and Login screen, after that It's just Ubuntu. I ran this command:
sudo apt-get install lubuntu-desktop
However I'm not sure how to switch back, I tried the purge command got rid of it now only black screen during loading.
Side Question: Dual Boot with Windows - Change Linux Dist without having to reformat entire Windows?