In this short article I will show you how to install the XFCE Desktop Environment on Ubuntu 12.04 Precise Pangolin and Linux Mint 13 Maya.
XFCE is a lightweight Desktop Environment, from the Ubuntu and Linux Mint official repos.
So, to install XFCE on Ubuntu and Linux Mint, just do:
$ sudo apt-get install xfce4
To remove XFCE from Ubuntu and Linux Mint, just do:
$ sudo apt-get remove xfce4
To use XFCE, reboot and login to your prefered Desktop Environemt.