https://redplus.me/post/set-up-headless-windows-10-virtual-machine-on-remote-linux-server/ https://www.ostechnix.com/install-oracle-virtualbox-ubuntu-16-04-headless-server/ https://www.howtoforge.com/tutorial/running-virtual-machines-with-virtualbox-5.1-on-a-headless-ubuntu-16.04-lts-server/
Installation
$ sudo nano /etc/apt/sources.list
deb http://download.virtualbox.org/virtualbox/debian stretch contrib
$ wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -
$ sudo apt-get update