Ubuntu: Play mp3, extract RAR files, install the java plugin... and much more

Recentlly I posted on How to play mp3 with ubuntu and now I am posting how to do it again but also:

The solution arrives by installing EasyUbuntu

Run this code into the terminal and enjoy :)

sudo apt-get install subversion
cd ; svn checkout svn://freecontrib.org/easyubuntu
gksudo easyubuntu/trunk/easyubuntu.py