This directory contains preconfigured Virtual Machines for Oracle VirtualBox (tested on version 5.2)

You will need to install VirtualBox (and Guest Extensions if USB2/3 or NVMe support desired) first.
https://www.virtualbox.org/wiki/Downloads

You can then download the .7z VM archives and extract them anywhere you like.
From there, double click the .vbox file in the extracted folder to load it into VirtualBox.

You may need to change some options to suit your PC setup, ex. SATA -> NVMe controller, or RAM 2GB -> 8GB, or USB1.1 -> USB3.0.
You should also enable the "Solid-state Drive" checkboxes on each virtual HDD if you are running the VM from an SSD or NVMe.
You will also need to change the adapter connected to the VirtualBox Bridged Adapter to the one you use for internet access to gain network connectivity.
I recommend using samba instead of shared folders via a Host-Only adapter. Example mount lines for Windows 10 can be found in /etc/fstab and /etc/samba/credentials.

IMPORTANT:
The default root password is "dev".
You should change this by opening a terminal and typing "passwd".

You should then create a non-root user and add it to sudoers. (replace yourshortname with something nice and personal)
root@discovery:~# adduser yourshortname
root@discovery:~# usermod -a -G sudo yourshortname

Now log out and log into your new user.

To become root from your user terminal, you can type "sudo su".

The default Linux kernel is a customized and optimized virtual machine configuration based on vanilla kernel.org sources.
The only additions are Samsung's exFAT drivers from github.com/jcadduono/linux_fs_exfat.

The operating system is Debian Buster (testing). It will be similar to the latest Ubuntu.

Have fun!