How to setup VirtualBox on Ubuntu

Source http://www.virtualbox.org/wiki/Linux_Downloads

1. Add the following line to /etc/apt/sources.list:

deb http://download.virtualbox.org/virtualbox/debian lucid contrib non-free

2. Add and register the Oracle public key:

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

3. To install VirtualBox:

sudo apt-get update
sudo apt-get install virtualbox-4.0

4. Add right for current user:

1. System / Administration / Users and groups
2. choose Users
3. Additional parameters / User's rights / Check - VirtualBox