TomSchober

sudo apt remove virtualbox virtualbox-5.0 virtualbox-4.*

sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian xenial contrib" >> /etc/apt/sources.list.d/virtualbox.list'
wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -
sudo apt update
sudo apt install virtualbox-5.1