Re: Lack of desktop environments in one system
There's so much wrong in the original post.
Linux Mint does not have all those different desktops preinstalled. Each copy of Mint comes with one desktop. You can install others after you've installed the base system.
Ubuntu comes with one desktop. You can install others after you've installed the base system.
The only difference is that you can only install Mate or Cinnamon on Ubuntu by using PPAs (they are not in the regular repositories), and it's very nearly impossible to get Unity to work on Linux Mint.
Linux Mint's ability to install different desktops comes directly from Ubuntu. And, to give credit where it's due, Ubuntu got it from Debian.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.