Install VirtualBox 4.3.14

Install VirtualBox 4.3.14 in Ubuntu 14.04

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Image credit: VirtualBox

Add VirtualBox 4.3.14 to your Ubuntu 14.04 system

VirtualBox 4.3.14 has been released, here's how you can install it in Ubuntu 14.04. This release mostly focuses on maintenance, you can view a complete list of changes in the VirtualBox 4.3.14 changelog.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each:
sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian trusty contrib" >> /etc/apt/sources.list'
wget http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -
sudo apt-get update
sudo apt-get install virtualbox-4.3
sudo apt-get install virtualbox-dkms

Source: Linux G