To start installing and using software from a Personal Package Archive, you first need to tell Ubuntu where to find the PPA. Important: The contents of Personal Package Archives are not checked or monitored. You install software from them at your own risk.
Adding the PPA to Ubuntu 9.10 (Karmic) and later
sudo add-apt-repository ppa:dockbar-main/ppa
Your system will now fetch the PPA's key. This enables your Ubuntu system to verify that the packages in the PPA have not been interfered with since they were built.
sudo apt-get update
Now you're ready to start installing software from the PPA!
sudo apt-get-install dockbarx
Now the dockbar is installed and you could right click on your Gnome taskbar to add to your panel the Dockbarx applet.