The Cairo Dock is an eye-catching and convenient dock interface for your Ubuntu desktop. With its features like multi-docks, launchers, taskbar, and many useful applets, you can advantageously replace it with your default dock panel. The panels can be easily detached from the Cairo dock and used as desktop widgets. You can totally customize the dock by using numerous ready-to-use themes that can be downloaded with a single click. So, if you are looking for a better looking, and much more easily customizable dock panel for your Ubuntu, Cairo Dock is a great choice for you.
Installing Cairo Dock
update the system
sudo apt-get update
Then use the following command as a sudo user in order to install Cairo Dock and its plugins to your Ubuntu:
sudo apt-get install cairo-dock cairo-dock-plug-ins
Launching the Cairo Dock
You can access the Cairo Dock from the Ubuntu application launcher bar as follows, or directly access it from the applications listing:
Launch Cairo Dock at Startup
It will be just a burden if you have to launch the dock each time at startup since we are looking for quick access to our applications in the first place. In order to make your Cairo Dock to be launched automatically at startup, right-click anywhere on this dock. In the right-click menu, click on the “Launch Cairo-dock at startup” option.
OR
Application menu -- Session and Start up -- Application autostart -- Add
Name -- Cairo Dock
Command -- cairo-dock -o
Referenece: