Find code and diagrams at: https://www.EliTheComputerGuy.com/ Installing Ubuntu Server into VirtualBox gives you the ability to create a lab environment without needing multiple physical machines. Hardware Requirements In general I would recommend your host computer has 16GB of RAM and an SSD. 8GB of RAM, or even less, will work but you may run into issues. Make sure you know the hardware requirements of the server OS. Ubuntu Server 18.04 LTS requires 512MB of RAM, and 2.5GB of Storage. https://help.ubuntu.com/lts/serverguide/preparing-to-install.html Installation ISO The LTS stands for Long Term Support and means Canonical will support this version for 5 years. Connect the downloaded ISO to your Virtual Machine by going to Settings - Storage - Select EMPTY under Controller: IDE - Click Circle Icon to the left side of the Optical Drive drop down box. Installation ISO automatically disconnects after installation.