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Hectal

Linux · the floor every backend stands on

Stop fearing the terminal.
Run servers like you own them.

Every container, cloud VM, and CI runner is Linux underneath. This course takes you from your first command to running and debugging production servers: files and permissions, text processing, processes and systemd, networking and SSH, scripting, storage, boot, and performance troubleshooting.

Start from zero The full roadmap
Phases
9
Topics
40
Hours
8
Diagrams
11
Exercises
147

By the end you can

What this course makes you able to do

  • Navigate, edit, search, and transform files fast with the shell, vim, and pipes
  • Manage users, permissions, sudo, packages, and services with systemd
  • Debug 'it can't connect', full disks, runaway processes, and slow servers methodically
  • Write robust Bash scripts and schedule them with cron or systemd timers
  • Harden and operate a production server, from boot to logs to backups

Beginner → Advanced

The curriculum, by level

Beginner
  1. 0The Linux Mindset4 topics · ~52 min
  2. 1Files, Permissions & Users7 topics · ~75 min
  3. 2Text Processing & the Unix Philosophy4 topics · ~53 min
Intermediate
  1. 3Processes & Job Control4 topics · ~55 min
  2. 4Networking & SSH4 topics · ~53 min
  3. 5Package Management & Environment3 topics · ~42 min
  4. 6Shell Scripting4 topics · ~56 min
Advanced
  1. 7Running Production Servers5 topics · ~64 min
  2. 8Linux Internals & Troubleshooting5 topics · ~37 min

Where should I start?

Pick a path for your goal

Absolute beginner

Never used a terminal before.

  1. 10 · The Linux Mindset
  2. 21 · Files, Permissions & Users
  3. 32 · Text Processing & the Unix Philosophy
  4. 43 · Processes & Job Control

Then Phase 4 onwards at your own pace.

Backend developer

You deploy apps and need to debug servers.

  1. 12 · Text Processing & the Unix Philosophy
  2. 23 · Processes & Job Control
  3. 34 · Networking & SSH
  4. 46 · Shell Scripting
  5. 57 · Running Production Servers

Finish with Phase 8 troubleshooting.

DevOps / SRE track

You'll own servers in production.

  1. 13 · Processes & Job Control
  2. 24 · Networking & SSH
  3. 37 · Running Production Servers
  4. 48 · Linux Internals & Troubleshooting

Continue to Networking and Docker.