Docker Core Concepts Every Developer Should Know

In this docker video we'll cover the concepts behind docker command — so everything Docker does finally makes sense. If you've ever been confused about why your container lost its data, why your build takes forever, or why your services can't find each other — this video explains the ideas behind Docker, not just the syntax. We cover containers, images, layers, Dockerfiles, volumes, networking, and Docker Compose — as one connected system. What you'll learn: - Why Docker is NOT a virtual machine - The difference between images and containers - How layers work and why instruction order affects build speed - What every Dockerfile instruction actually does (FROM, RUN, COPY, CMD, ENTRYPOINT, ENV, EXPOSE) - How volumes solve the data persistence problem - How container networking and DNS resolution work - How Docker Compose ties everything together Timestamps: 0:00 Hook 0:39 What Docker Actually Is 3:12 Images vs Containers 5:33 Layers — Why Docker Is Efficient 8:14 The Dockerfile — Thinking in Build Steps 11:10 Volumes — Solving the Persistence Problem 13:26 Networking — How Containers Talk 16:11 Docker Compose — Orchestrating the Whole Thing 18:48 Closing Earlier Docker Video (Docker internals/its not VM ) - https://youtu.be/DUgzXX2_aDQ More Videos : Software Egineering Basics - https://www.youtube.com/playlist?list=PLWP-VtjCVpWyLNBm3zz_sGyC5mVwiAOvj Software Design - https://www.youtube.com/playlist?list=PLWP-VtjCVpWx7kPq30XRN6O6LjVQ4VL95 #Docker #DockerTutorial #DockerCompose #Containers #DevOps #SoftwareEngineering #Dockerfile #DockerVolumes #DockerNetworking