Howtogeek shows you how to upgrade to the latest versions of your favorite Ubuntu software with PPAs

Ubuntu gets its stability from heavily testing new versions of software. However, if you want to risk some instability and try out the latest versions of your favourite programs, we'll show you how!

Using these newer packages requires using software sources outside from the normal Ubuntu repositories. Fortunately, there are hundreds, and adding them to Ubuntu is extremely easy!
These other software sources are called Personal Package Archives (PPAs). In most cases, searching for the software you want to upgrade and the word ?ppa? will get you to a page that tells you the name of the PPA and some extra details. All that you really need is the name of the PPA.

  Upgrade to the Latest Versions of Your Favorite Ubuntu Software with PPAs