🛠️ DevOps Tutorials

Free DevOps tutorials and step-by-step guides for developers.

Automate Server Setup with an Ansible Playbook

Install packages, create users, deploy config files, and run commands across one or many servers — repeatably, from a single YAML file.

Docker Compose: Define and Run Multi-Container Applications

Move beyond single-container Docker commands. Define your entire stack in one file, bring it up with one command, and share it with your team.

Docker Health Checks: Keep Containers Self-Healing

Add a HEALTHCHECK to your Dockerfile so Docker knows when a container is ready and when it has gone wrong — and can restart it automatically.

Environment Variables in Docker: .env Files, Secrets, and Build Args

Pass configuration into containers the right way — keeping credentials out of images and Dockerfiles, and keeping dev and prod configs separate.

GitHub Actions: Build Your First CI/CD Pipeline

Automatically test, build, and deploy your code on every push. Set up a working pipeline from scratch without reading the entire Actions documentation.

Multi-Stage Docker Builds: Smaller Images, Cleaner Production

Use build stages to compile your code in a full environment and ship only the result — without build tools, source files, or test dependencies in the final image.

Write a Dockerfile That Builds in Under 10 Seconds

Cache layers in the right order, keep context small, and stop rebuilding the world every time you change a source file.