Install virtualbox virtual machine under ubuntu

#ubuntu virtualbox install

sudo apt-get install libsdl1.2debian
sudo apt-get install libsdl-ttf2.0-0
sudo apt-get install dkms

Choose one of the following methods
===【Method 1】============================

sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian trusty contrib" >> /etc/apt/sources.list.d/virtualbox.list'

or

sudo vi /etc/apt/sources.list.d/virtualbox.list

Write:
deb http://download.virtualbox.org/virtualbox/debian trusty contrib
save

sudo 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

===[Method 2]============================
Download the deb installation package

sudo dpkg -i virtualbox-4.3_4.3.18-96516~Ubuntu~raring_amd64.deb