Cybersecurity is part of computer science related to breaking computer security and protecting computers from attacks

red_team_tools red_team_learning

cheatsheets for protecting your service

GreyNoise IP check - check if some malicious activity has been observed on your network

For beginners

• CTF Field Guide
• gynvael coldwind's faq (in polish)

Zines

• tmpout.sh
• Phrack
• pagedout.institute

Other

• Lists of sites that might be free C2 servers and similar stuff

OSINT

• Hitchhiker's Guide (anonimity guide)
• Bellingcat’s Online Open Source Investigation Toolkit
• Osintracker
• osint exercises