Server Hardening Guide — DevOps Edition (2025)

A Practical, No-Nonsense Security Handbook for SysAdmins, DevOps & Cloud Engineers

Are you running Linux servers in production?
Then you already know one truth: a single misconfiguration is all it takes for an attack.

This guide cuts through the noise and gives you a battle-tested server hardening workflow, used by real DevOps and sysadmins in the field. No long theory, no fluff — just actions, explanations, and copy-paste commands that secure your servers immediately.