Installing Virtualbox on Ubuntu 10.04 Lucid Lynx using PPA

First step -> Add virtualbox repository 

• sudo add-apt-repository "deb http://download.virtualbox.org/virtualbox/debian lucid non-free"

Second -> Download and Add Virtualbox gpg key

• wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add - 

Third -> Updating your Ubuntu and installing dkms and Virtualbox

• sudo apt-get update && sudo apt-get install dkms virtualbox-3.2