Please advice how to properly install Gnome Flashback DE on Ubuntu 14.04 (that comes with Unity by default). I want keep all application that was preinstalled with Unity DE: LibreOffice Writer, Calc, Impress, etc. Should I only run:
sudo apt-get update sudo apt install gnome-session-flashback
Should I uninstall Unity first? Or after installation of Gnome Flashback? There is no need to have two Desktop Environment installed.