Install Ubuntu on Oracle VirtualBox
https://brb.nci.nih.gov/seqtools/installUbuntu.htmlInstall Ubuntu. Back to Oracle VM VirtualBox Manager, click on the new Ubuntu virtual machine and hit 'Start' button. Now you shall see a 'Welcome' screen. Click 'Install Ubuntu' button. Note that the installation process may differ a little bit from version to version. The screenshots here are based on Ubuntu 14.04.1. Click 'Continue' button.
How to Install Ubuntu on VirtualBox
https://www.makeuseof.com/install-ubuntu-virtualbox16.10.2020 · 2. Download the Ubuntu 20.04 LTS ISO File. To install Ubuntu on your virtual machine, you'll need the installation media. For installation on a computer you would typically burn the ISO file to a DVD or USB stick. Fortunately, if you're installing Ubuntu in a VM, you can just use the downloaded ISO. Various versions of Ubuntu are available.