如何使用关于mysql驱动程序的类路径?“无法找到具有类名:com.mysql.jdbc.Driver的驱动程序”

I am installing Atlassian Confluence on our Ubuntu 12.04 64bit Server. I downloaded a fully packed installation of Confluence and already installed it on a virtual machine for testing. Now I install it on the server and when it comes to Database configuration I choose MySQL and External DB. Then I get this error I am installing Atlassian Confluence on our Ubu