Tutorials

Learn how to refine AI responses without losing the goal: when to iterate, when to start fresh, and how to keep long conversations under control.

Understand local scope, global scope, nested functions, global, nonlocal, and why Python sometimes seems to hide your variables for sport.

Before writing your first query, understand what problem databases solve: persistence, relationships, concurrency, querying, and real guarantees.

Learn Docker Compose networking: default networks, service names, ports, custom networks, external networks, and aliases without chasing changing IPs.

Learn Docker Compose volumes: named volumes, bind mounts, database persistence, development workflows, and backups without praying to the container gods.

Set up a usable DevOps environment from day one: Linux, WSL, cloud, SSH, terminal, and essential tools without turning your laptop into a weird experiment.

Start the DevOps, SRE, and Platform Engineering course by understanding what problem DevOps solves, why it is not just a role, and how the roadmap fits together.

Learn how to use marks, the jump list, and the changelist in Vim to move between positions without losing your place, and how to get real mileage out of gf, gd, and %.

Real health checks with condition: service_healthy, environment variables from .env, restart policies, and a complete working stack that behaves the same on your laptop and in production.

Docker Compose turns four `docker run` commands you run from memory into a single declarative file and one command. This is where Docker starts feeling useful on a daily basis.

A CI/CD pipeline starts with a git push. This lesson covers how to configure Git correctly in GitHub Actions and GitLab CI: shallow clones, caching, permissions, and the practices that actually make a difference.

git checkout has been doing too many things for too long. git switch and git restore arrived in 2019 to fix that design. They've been stable for years — time to use them.