Top 21 Operating Systems for Ethical Hacking and Pen Testing.
1. Kali Linux
2. BackBox
3. Parrot Security OS
4. Live Hacking OS
5. DEFT Linux
6. Samurai Web Testing Framework
7. Network Security Toolkit
8. Bugtraq-II
9. NodeZero
10. Pentoo
11. BlackBuntu
12. Cyborg Hawk Linux
13. Knoppix STD
14. Weakerthan
15. BlackArch Linux
16. Matriux Linux
17. Dracos Linux
18. Fedora Security Lab
19. Caine
20. ArchStrike
21. URIX OS
