- Always do your work on special dedicated machine or virtualization environment and don't forget about VPN!
- Don't hack the systems or applications without explicit permission. Except Russia.
- Kali Linux - Kali Linux. Special OS for offensive security specialists.
- Parrot Security - Parrot Security OS.OS for security specialists.
- Tails – Live OS aimed at preserving privacy and anonymity.
- ArchStrike – Arch GNU/Linux repository for security professionals and enthusiasts.
- BlackArch – Arch GNU/Linux-based distribution with best Hacking Tools for
penetration testers and security researchers.
- Network Security Toolkit – Fedora-based bootable live operating
system designed to provide easy access to best-of-breed open source network security applications.
- Pentoo – Security-focused live CD based on Gentoo.
- BackBox – Ubuntu-based distribution for penetration tests and security assessments.
- Fedora Security Labs – Provides a safe test environment to work on
security auditing, forensics, system rescue and teaching security testing methodologies.
- AttifyOS – GNU/Linux distribution focused on tools useful during Internet of
Things (IoT) security assessments.