How to install cinnamon desktop environment in ubuntu 13.10 (Saucy Salamander)
Cinnamon 2.0 was released on 10 October 2013. From this version, Cinnamon is no longer a frontend ontop of the GNOME desktop like Unity or GNOME Shell, but "an entire desktop environment". Cinnamon is still built on GNOME technologies and uses GTK+, but it no longer requires GNOME itself to be installed. Biggest changes in this release are improved edge-tiling, improved user management, configurable individual sound effects and performance improvements for full screen applications.
Install Cinnamon 2.0.12 on ubuntu 13.10/13.04/12.10
Open the terminal and run the following commands
sudo add-apt-repository ppa:gwendal-lebihan-dev/cinnamon-stable
sudo apt-get update
sudo apt-get install cinnamon
This will install 2.0.12 and it works with ubuntu 13.10 without breaking unity