install virtual box

virtualbox_install.sh

# Instructions on how to install virtual
# Confirmed this works on Linux Mint 18.1 Serena 64bit. Desktop environment Cinnamon. Ubuntu codename xenial.

# First uninstall any current versions of virtual box 

sudo apt autoremove --purge virtualbox*
## check if removal was successful
dpkg -l virtualbox* | grep ^i
## if not successful uninstall/purge by name listed
sudo dpkg --purge virtualbox=5.0.40-dfsg-0ubuntu1.16.04.1

## update sources
sudo apt update

# Install virtual box
wget http://download.virtualbox.org/virtualbox/5.1.12/virtualbox-5.1_5.1.12-112440~Ubuntu~xenial_amd64.deb -O /tmp/virtual-box.deb
sudo dpkg -i /tmp/virtual-box.deb

## confirm installation
dpkg -l virtualbox* | grep ^i