How Docker Actually Works | Images, Containers & Layers Explained

What actually happens when you build a Docker image and run a container? In this visual tutorial, we explore Docker from the inside—connecting the commands you use to the layers, filesystems, and processes behind them. You’ll learn: • The difference between a Docker image and a container • How image layers are shared and reused • How writable layers and copy-on-write work • How containers differ from virtual machines • How a Dockerfile becomes an image and a running container • How container networking connects application services Whether you’re learning Docker for the first time or want a clearer understanding of its internals, this lesson helps you build a practical mental model. Subscribe to CS Academy for more visual computer science tutorials. Which Docker concept should we explain next? Let us know in the comments. #Docker #Containers #DevOps