A pod is not a container. Understanding the distinction — and why Kubernetes uses pods as its fundamental unit — is the first conceptual step to working effectively with Kubernetes.
Once you have more containers than you can manage manually, you need an orchestrator. Kubernetes is the standard — here's the architecture and the concepts you need to understand before running a single command.
Real applications aren't single containers. Here's how to build a Node.js + MongoDB two-container setup, wire them together over a custom network, and push the image to Docker Hub.
Docker creates three networks by default and lets you create more. Understanding which driver to use and when is what separates working setups from broken ones.
Containers are ephemeral by design. Docker volumes are how you keep data alive across container restarts, removals, and re-deploys — here's how they work and when to use them.
A practical reference for the Docker commands that cover 95% of real-world container operations, with context on when and why to use each one.