[VirtualBox] How to install GuestAddition on ubuntu guest VM?

sudo apt-get install virtualbox-ose-guest-utils  virtualbox-ose-guest-x11 virtualbox-ose-guest-dkms

Reference:
http://mylinuxramblings.wordpress.com/2010/06/03/installing-virtualbox-guest-additions-on-ubuntu-server-10-04/

http://ubuntuforums.org/showthread.php?p=12383697