Commandos:

echo deb http://download.virtualbox.org/virtualbox/debian $ (lsb_release-cs) contrib | tee sudo / etc / apt / sources.list.d / virtualbox.list

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

sudo apt-get update

sudo apt-get install virtualbox-4.0

sudo adduser $ (whoami) vboxusers