Category Archives: Virtualization

A practical checklist for writing Dockerfiles that produce functional, lightweight, debuggable, and secure images — multi-stage builds, layer ordering, healthchecks, and more.

Learn how to run Docker containers securely — non-root users, read-only filesystems, capability limits, secret management, and image vulnerability scanning.

Learn how Docker Compose v2 works — define, build, and run multi-container applications with a single YAML file and a single command.

Learn the three Docker storage types — volumes, bind mounts, and tmpfs — and how to use them to persist data outside a container so it survives restarts and replacements.

Learn how Docker networking works — bridge, host, overlay, and macvlan drivers — and how to connect containers so they can communicate over a private network.

Learn how to write a Dockerfile, build a custom image, understand the layer cache, and serve your own web content with a custom Nginx container.

Understand the real differences between containers and virtual machines — how each one works under the hood, their pros and cons, and when to use which.