Linux is an open source operating system that manages hardware and software resources. Kali Linux is a well-known distribution specifically designed for ethical hacking and penetration testing, featuring numerous security tools. It was released on March 13, 2013, as a complete rebuild of Backtrack Linux in compliance with Debian standards.

1. Linux Flavors for
Hacking and Pen-
testing

2. What is Linux?
Linux® is an open source operating system (OS). An operating
system is the software that directly manages a system’s hardware
and resources, like CPU, memory, and storage. The OS sits between
applications and hardware and makes the connections between all of
your software and the physical resources that do the work.
Linux was designed to be similar to UNIX, but has evolved to run on
a wide variety of hardware from phones to supercomputers. Every
Linux-based OS involves the Linux kernel—which manages
hardware resources—and a set of software packages that make up
the rest of the operating system.

3. Popular Linux Distros
 Android
 Arch Linux
 Ubuntu
 Debian
 Kali Linux
 Linux Mint

4. Kali Linux
Kali Linux is the most
widely known Linux
distro for ethical
hacking and penetration
testing. Kali Linux is
developed by Offensive
Security and previously
by BackTrack.

5. Kali Linux (formerly known as BackTrack Linux) is an open-
source, Debian-based Linux distribution aimed at advanced
Penetration Testing and Security Auditing. Kali Linux contains
several hundred tools targeted towards various information
security tasks, such as Penetration Testing, Security Research,
Computer Forensics and Reverse Engineering. Kali Linux is a
multi platform solution, accessible and freely available to
information security professionals and hobbyists.
Kali Linux was released on the 13th March 2013 as a complete,
top-to-bottom rebuild of BackTrack Linux, adhering completely to
Debian development standards.
ABOUT KALI LINUX