A few months ago I installed Gnome on my Ubuntu 15.10, 15 minutes later I decided to remove and revert back to Unity. I didn't remember how I removed Gnome but I remember reading from AskUbuntu and after uninstalling Gnome the boot animation remained. I didn't mind it.
Last night after a few unsuccessful "do-release-upgrade" attempts to update my ubuntu laptop 16.04 to 16.10, I decided partially update the whole system (package by package) throughout the whole day, I successfully logged into 16.10 but not into unity, gnome. I checked the little box on login screen options to select unity.
What Should I do to start using my ubuntu 16.10 with Unity. I got a few customizations on unity configuration, it would be really cool to keep them intact while reverting if possible.
Any help greatly appreciated. Thanks in advance.