clipped from: www.virtualbox.org   

Download VirtualBox for Linux Hosts ΒΆ

/etc/apt/sources.list
deb http://download.virtualbox.org/virtualbox/debian hardy non-free
deb http://download.virtualbox.org/virtualbox/debian gutsy non-free
deb http://download.virtualbox.org/virtualbox/debian dapper non-free
deb http://download.virtualbox.org/virtualbox/debian lenny non-free
deb http://download.virtualbox.org/virtualbox/debian etch non-free
deb http://download.virtualbox.org/virtualbox/debian sarge non-free
deb http://download.virtualbox.org/virtualbox/debian xandros4.0-xn non-free

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