Cairo-Dock is an very popular animated application launch bar in Ubuntu,comparable to the dock in Mac OS X or Rocket Dock.Unfortunately the Cairo-Dock’s domain has changed,the new website is
In Ubuntu Karmic and older,we need change the repository, simply replace ‘’ by ‘’ to keep update.

If you want to test the latest version, updated every weeks.Keep reading:
Open terminal from Applications->Accessories menu,then copy and paste following 5 commands:

sudo -v
echo "deb $(lsb_release -sc) main ## Cairo-Dock-PPA-Weekly" | sudo tee -a /etc/apt/sources.list
sudo apt-key adv --keyserver --recv-keys E80D6BF5
sudo apt-get update
sudo apt-get install cairo-dock


To learn more about Cairo-Dock: