Here’s a list of the best operating systems used by professional hackers.
#1 Kali Linux
First on the list is Kali Linux. Kali Linux is an open source project that is maintained and funded by Offensive Security. This Debian-based OS comes with 600+ pre-installed pen testing tools that make your security toolbox richer.
Kali Linux includes many well known security tools, including:
#2 Parrot Security OS
Parrot Security OS is a GNU / Linux distribution based on Debian. Parrot includes by default TOR, I2P, anonsurf, gpg, tccf, zulucrypt, veracrypt, truecrypt, luks and many other tecnologies designed to defend your privacy and your identity.
The BackBox Linux project was born in south Italy in 2010. The project was begun on the initiative of a single individual. Within a few months, it accrued a well populated community which continues to expand. Back Box is an evaluation penetration testing Linux distribution and Ubuntu-based security aimed at providing an analysis of computer network systems and toolkit.The main aim of BackBox is providing an alternative, highly customizable and well performing system. BackBox uses the light window manager Xfce.
#4 DEFT Linux
The open source Linux distribution DEFT stands for Digital Evidence and Forensic Toolkit. EFT Linux v5 is based on the new Kernel 2.6.31 (Linux side) and the DEFT Extra 2.0 (Computer Forensic GUI) with the best freeware Windows Computer Forensic tools.