I have been using Cinnamon on Ubuntu 13.10 (and previous versions) on my main laptop.
I installed Ubuntu 14.04 on my spare laptop and it goes well but I can't see how to install Cinnamon on 14.04. I usually just put in the three command lines, but can't find how to do this for 14.04. Could it be that it currently too unstable? I've checked through the forum and can't see any other similar queries for 14.04. I even did a google search.