Recently I posted a video in our video tutorials page on "How To Install Genymotion And Run Android Apps (Whatsapp) On Ubuntu 14.10/Linux Mint Or Others Video Tutorial". I was asked for simpler way of installing VirtualBox instead of downloading package from website and depackaging it through dpkg. So here you can also install it from ppa.
VirtualBox is used to install another virtual operating system inside one operating system. If you want to know more about VirtualBox then read here.
Install VirtualBox using ppa
First of all install dependency for VirtualBox.
sudo apt-get install dkms
To add ppa and key use the following commands -
wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -
Add the public key to your repository that you just installed