Working with Docker CLI is very straightforward - you just build, run, inspect, pull and push containers and images, but have you ever wondered how do the internals behind this Docker interface actually work?

Behind this simple interface hides a lot of cool technologies and in this article you can learn about one of them - the union filesystem - the underlying filesystem behind all the container and image layers.

Martin Heinz shares some of his favorite git features: word diff, auto-correct, plugins, and commit signing.

At this point probably everybody has heard about Docker and most developers are familiar with it, use it, and therefore know the basics such as how to build a Docker image. It is as easy as running docker built -t name:tag ., yet there is much more to it, especially when it comes to optimizing both the build process and the final image that is created.

The article goes on to cover caching, slimming, and securing your images so they’ll run faster and be less prone to abuse.

Container security is often overlooked topic, as people assume that containers are secure by default - which is not true. One of the ways to secure container workloads in Docker and Kubernetes is to leverage seccomp profiles and this advanced feature of container runtimes is explained and shown in this article.