Open Terminal (Ctrl + Alt + T).
Add repository.
raj@geeksite~/$ sudo add-apt-repository ppa:merlwiz79/cinnamon-ppa
Update the system repository.
raj@geeksite~/$ sudo apt-get update
Install Cinnamon desktop.
raj@geeksite~/$ sudo apt-get install cinnamon-session cinnamon
Once installed, logout and select cinnamon by clicking on gear icon in login page.
Now you should get the following desktop.
That’s all!