#! /bin/sh
if [ ! -f /usr/bin/virtualbox ]; then
    VIRTUALBOXXKEY=https://www.virtualbox.org/download/oracle_vbox.asc
    /usr/bin/wget --quiet -O - "$VIRTUALBOXXKEY" | sudo /usr/bin/apt-key add -
    sudo /bin/sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian trusty contrib" >> /etc/apt/sources.list.d/virtualbox.list'
    sudo /usr/bin/apt-get update
fi