🐧

Linux Learning Roadmap

From shell basics to kernel-level troubleshooting on production systems.

Estimated time:2–4 months

1🌱

Phase 1 — Fundamentals

Filesystem hierarchy & permissions

Process management (ps, top, kill)

Package managers (apt/yum/dnf)

Users, groups, sudo

2⚙️

systemd services & units

Networking basics (ip, netstat/ss, iptables)

Disk & filesystem management (LVM, mount)

Log management (journalctl, /var/log)

3🔥

CPU/memory/IO bottleneck diagnosis

strace/lsof for live debugging

Kernel parameters (sysctl)

4🔐

important

SELinux/AppArmor basics

SSH hardening & key management

Begin with interview questions to assess your current level.