What containers are — images, registries, isolation, and containers vs VMs.
A container packs your app together with everything it needs to run, so it behaves the same on every machine. Learn what a container really is, how it differs from just installing software, what's actually inside one, and why containers changed how software ships — explained from zero.
Containers and virtual machines both let one physical server run many isolated workloads, but they solve the problem in completely different ways. Learn how each one works, where the line is drawn, what they trade off, and when to reach for which — from the ground up.
Containers aren't hype — they fix concrete, painful problems: 'it works on my machine,' messy dependencies, slow onboarding, and fragile deployments. Here's what containers actually buy you, when they're worth it, and when they're overkill.
A container image is the read-only template a running container is created from — your app, its dependencies, and a recipe for the filesystem, frozen into one shareable artifact. Learn what an image really is, how its layers work, where the tag comes from, and why images are the unit everyone.
A container registry is a storage hub for container images — push an image to it, pull it from anywhere. Learn what a registry really is, how push and pull work, the difference between public and private registries, how tags and repositories are organized, and why registries sit at the center of.
A container feels like its own little computer, but it shares the host's kernel with everything else. Learn what isolation really means, the Linux features that make it work — namespaces, cgroups, and the filesystem — and where the walls are thinner than people assume.
Containers are isolated by default, yet they still need to reach each other, the host, and the internet. Learn how container networking works — virtual networks, port publishing, DNS between containers, and the bridge that ties it all together — explained from zero.
Containers and bare metal sit at opposite ends of the 'how should this run' question. Learn what bare metal really means, where containers add a layer, the trade-offs in speed, isolation, and density, and how to pick the right one for a real project — explained from the ground up.