All lessons

The minimum you need before anything else works: filesystem, permissions, processes, pipes.

Linux right in this browser tab. Real commands, nothing to install.

Commits, branches, merges, conflicts. Less about how to push code, more about how to read someone else's history.

Containers, images, networking, compose. No magic: what mounts where.

The full theory course: from your first Pod to troubleshooting incidents. Free to read, no limits.

OSI/TCP-IP, IP and ports, DNS, HTTP, and how to diagnose it when something's broken.

Pipelines, builds, deploys. From git push to production with no manual steps.

Describe your infrastructure in files, not clicks. The Terraform approach and Ansible.

Metrics, logs, traces. What to check when production goes quiet.

Cloud services, data storage, and MLOps: the basic model and terms.