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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

# Modifying files within a container

In this lesson, we'll exec onto the `webserver` container and edit the web server configuration to display a new message on the home page. You'll also stop and restart the container and verify your changes aren’t lost.

> **WARNING:** This lesson is for demonstration purposes only. In the real world, you shouldn't change live containers like this. Any time you need to change a live container, you should create and test a new container with the required changes and then replace the existing container with the new one.

Open a new interactive exec session to the `webserver` container with the following command.

Let’s take a look at the typical container lifecycle events like stopping, restarting, and deleting a container and how they affect the changes we make to the container.



Managing the Container Lifecycle

Let’s take a look at the typical container lifecycle events like stopping, restarting, and deleting a container and how they affect the changes we make to the container.

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

Managing the Container Lifecycle

Modifying files within a container