Kali Linux is distributed in 32-bit and 64-bit images for use on hosts based on the x86 instruction set and as an image for the ARM architecture for use on the Beagle Board computer and Samsung's ARM Chromebook.

50 GB of hard disk space, SSD preferred.

The recommended hardware specification for a smooth experience are:

A minimum of an Intel Core i3 or an AMD E1 processor for good performance.

A bootable CD-DVD drive or a USB stick.

A minimum of 2GB RAM for i386 and AMD64 architectures.

A minimum of 20GB hard disk space for installation depending on the version, Version 2020.2 requires at least 20GB.

With version 2020.3 in August 2020, the default shell was switched from Bash to ZSH, with Bash remaining as an option.

With version 2019.4 in November 2019, the default user interface was switched from GNOME to Xfce, with a GNOME version still available. The first version, 1.0.0 'moto', was released in March 2013.

The tagline of Kali Linux and BackTrack is 'the quieter you become, the more you are able to hear', which is displayed on some backgrounds. Tools highlighted in the show and provided by Kali Linux include Bluesniff, Bluetooth Scanner (btscanner), John the Ripper, Metasploit Framework, Nmap, Shellshock, and Wget. Kali Linux's popularity grew when it was featured in multiple episodes of the TV series Mr. Most packages Kali uses are imported from the Debian repositories. Kali Linux is based on the Debian Testing branch. It was developed by Mati Aharoni and Devon Kearns of Offensive Security through the rewrite of BackTrack, their previous information security testing Linux distribution based on Knoppix. Kali Linux has approximately 600 penetration-testing programs (tools), including Armitage (a graphical cyber attack management tool), Nmap (a port scanner), Wireshark (a packet analyzer), metasploit (penetration testing framework), John the Ripper (a password cracker), sqlmap (automatic SQL injection and database takeover tool), Aircrack-ng (a software suite for penetration-testing wireless LANs), Burp suite and OWASP ZAP web application security scanners, etc. It is maintained and funded by Offensive Security. Kali Linux is a Debian-derived Linux distribution designed for digital forensics and penetration testing.

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