Kali Linux is a Debian-based Linux distribution that is used for advanced penetration testing and security auditing. Here are the steps to use Kali Linux:

1. Define scope and goals.
2. Reconnaissance and OSINT.
3. Scan and discover.
4. Gain unauthorized access and exploit.
5. Post-exploitation.
6. Clean up your mess.

Here is a step-by-step process on how to install Kali Linux using VirtualBox . You can also check out this tutorial for beginners on how to install and use Kali Linux .