An advocate for software freedom for more than a decade, O'Brien has written and recorded dozens of tutorial podcasts for people wanting to learn how they can make use of open source software. His long-running series on LibreOffice is quickly approaching a 40-episode milestone. Another series on privacy and security, which helps everyday computers users take advantage of encryption technologies, runs concurrently (one recent episode features O'Brien at a conference giving—what else?—a talk). Learning new software can make casual users feel lost in a sea of new procedures, techniques, icons, and settings. O'Brien's voice is the lighthouse that keeps them firmly and confidently on course.
If you use Ubuntu 12.04, use the second ( PPA below. For Ubuntu 14.04, you can use any of the two PPAs below.
Tsvetko's stable Cinnamon PPA provides the latest Cinnamon for Ubuntu 14.04 (2.2.13) and Cinnamon 2.0.14 for Ubuntu 12.04 (that's because newer Cinnamon versions don't work in Ubuntu 12.04) as well as all the required packages like Nemo, cinnamon-screensaver, etc.