This repository is meant to be just a simple reference containing some sort of Vagrantfile samples.
In order to get up and running you need both Vagrant and VirtualBox installed.
Once you setup them, just dive into some sample directory and get your Vagrant running by means of the following command:
cd minimal
vagrant up
In order to use your brand new Vagrant, just get logged into using SSH:
vagrant ssh
Once you are done, shutdown your virtual machine:
vagrant halt
Or else, if you want to discard it:
vagrant destroy -f
Simple like this.