Linux — resources
roadmap.sh: https://roadmap.sh/linux
Books
- How Linux Works, 3rd Edition (Brian Ward) — explains what happens under the hood, from boot to processes to networking.
- The Linux Command Line (William Shotts) — the canonical, beginner-friendly tour of the shell and core utilities.
- UNIX and Linux System Administration Handbook, 5th Edition (Nemeth, Snyder, Hein, Whaley, Mackin) — the deep reference for real-world sysadmin work.
- Linux Bible (Christopher Negus) — broad, practical coverage spanning desktop to server administration.
Courses / practice
- Linux Journey — free, structured, hands-on lessons from basics to networking and security.
- The Linux Foundation: Introduction to Linux (LFS101) — free official course covering distributions, the shell, and administration.
- OverTheWire: Bandit — gamified wargame that teaches the command line through real puzzles over SSH.
- Linux man-pages project — authoritative online manual pages for commands, syscalls, and config files.