Install docker (Linux Mint as example. Information on other OSes are welcome too.)
$ sudo apt install docker.io
Add your username to the “docker” group (or by editing /etc/group directly).
$ sudo usermod -aG docker your_username
Logout & login to make the change of group into effect, or simply reboot your Linux.
Run a ubuntu container (docker client will automatically pull a ubuntu image and create a local container.). If you get a console with command prompt “root@xxxxxxxxxxxx:/,” it worked.
$ docker run -i -t ubuntu /bin/bash
Exit the container by exit (notice the prompt changed to “#”, showing you are the root)
# exit
Step 2 (if you have an NVidia GPU): Install Nvidia GPU support