A modular, open‑source toolkit for cyber‑security professionals built with nix & markdown

N4C (nix4cyber) is a personal knowledge-base and toolbox for CTF (capture the flag) & OSINT

It combines three core components:

• Nix-based shells: pre-configured environments for specific security domains (web, cracking, networking, forensic, ...).
• Cheat‑sheets: quick reference guides organized by category.
• CTF write‑ups: markdown-formatted reports of challenges we've solved.

All content is served through a static website built with Hugo and the Doks (<3) theme, hosted on Netlify. The project is fully open‑source under the MIT license and lives on GitHub.

To use nix4cyber, you need to have Nix installed on your system. You can then start a shell with the following command:

nix develop github:nix4cyber/n4c#<toolkit>

You could also install the alias n4c (see here) and only type n4c <toolkit>

More informations about shells & toolkits here

# Example: Launch the web pentesting toolkit
nix develop github:nix4cyber/n4c#web

# Inside the shell
nmap -A target.com

Nix4cyber is intended solely for lawful, ethical, and educational purposes. It is designed to assist cybersecurity professionals, researchers, and students in conducting authorized security assessments, penetration testing, and digital forensics within environments where they have explicit permission to operate.

By using this project, you agree to comply with all applicable laws and regulations. The maintainers of Nix 4 Cyber are not responsible for any misuse of the tools or scripts provided. Unauthorized or malicious use of this project is strictly prohibited and may violate local, national, or international laws.

Use responsibly. Always obtain proper authorization before conducting any security testing.

Contributions are welcome!
Feel free to open issues, propose new toolkits, or share CTF write-ups via pull requests.