In this chapter, we learned how to use VirtualBox, which allows us to install machines such as Kali Linux, and Windows, inside our own machine. We also learned how to install Kali Linux, which is going to be our attacking machine throughout the book, and how to install our victim machines, Windows and Metasploitable. Lastly, we studied what snapshots are, and how they can help us to retain our past setups in the virtual environment.

In upcoming chapters, we will see how to use the Kali Linux machine to attack both the Windows machine and the Metasploitable machine.