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Gain insights into Docker with Nigel Poulton. Learn about container basics, image creation, and application containerization, and demystify jargon to proficiently deploy Docker in real-world scenarios.

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Containers have revolutionized the IT world and it can be hard to know where to start. In this course, Docker Captain Nigel Poulton guides you through the basics all the way to proficiency.

You'll learn why we have containers and how they work. You’ll run through the basics like images, the Docker engine, and containers. With the basics out of the way, you'll then containerize an application and learn how to run it. Throughout the course, Nigel will demystify all the jargon and buzzwords. When you're done, you'll be ready to use Docker in the real world.

The Beginner’s Guide to Docker

# Sharing layers to improve performance
Docker images can share layers, leading to efficiencies in space and performance. One of the earlier `docker pull` commands generated an `Already exists` message for one of the layers it pulled. This occurred because one of my Docker Desktop extensions had already pulled an image that used the exact same layer. As a result, Docker skipped that layer as it already had a local copy.

Here’s the code from earlier:



See how sharing layers can optimize the image build process. 

Sharing Image Layers

See how sharing layers can optimize the image build process.

About the Course

Containers From 30,000 Feet

Docker and Container-related Standards and Projects

The Big Picture

The Docker Engine

Working with Images

Working with Containers

Containerizing an Application

Conclusion

Appendix: Getting Docker

Sharing Image Layers

Sharing layers to improve performance