To install Cinnamon on Ubuntu 14.04, enter the commands in Terminal:
$ sudo add-apt-repository ppa:lestcape/cinnamon
$ sudo apt-get update
$ sudo apt-get install cinnamon
reference: OMG!Ubuntu! - How to Install Cinnamon from a PPA on Ubuntu 14.04
Note for using RecordMyDesktop on Cinnamon:
By default, the bottom bar will disappear when running RecordMyDesktop to record your screen activity. To fix it, run with Extra Options of --no-frame.
- Click Advanced button.
- Select Misc tab.
- Enter "--no-frame" in Extra Options box.