Beginner · Oct 5, 2025
Linux Foundations for Security Work
Shell fluency, permissions, processes, and networking basics every defender and offensive learner needs.
Fundamentals
Get comfortable on the wire of the OS.
Before you chase zero-days, learn how users, groups, file modes, and services actually work. Security is just systems literacy under stress.
Practice goals
Navigate the filesystem without a GUI. Inspect running processes. Read journald logs. Understand what setuid means — and why it matters.
whoami && id && ls -la /etc/passwd
ss -tulpn | head
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