Applying updates and configuring extra security tools
In this recipe, we will cover the process of updating Kali and configuring some extra tools which will be useful in later chapters and recipes. As Kali packages are constantly updated between releases, you will soon find that a newer set of tools are available than what were originally downloaded on your DVD ROM. We will start by updating our installation, obtaining an activation code for Nessus, and conclude by installing Squid.
How to do it...
Let's begin the process of applying updates and configuring extra security tools:
Update the local package index with the latest changes made in the repositories: