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In this course, you’ll learn about containers, creating images, containerizing applications, and effectively deploying Docker in real-world scenarios.

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Containers have revolutionized the IT world, making it difficult to know where to begin. This course will take you from basics to proficiency step by step.
You’ll start by learning the basics of containers and how they work. Then, you’ll explore key concepts like images and the Docker engine. With the basics out of the way, you’ll learn how to containerize and run an application. After completing this course, you’ll be ready to use Docker in the real world.

Docker Guide for Beginners

Earlier in the chapter, we learned that containers are designed to run a single process, and terminating this process also terminates the container. Let’s test if that’s true. 

Run the following command to start a new interactive container named `ddd-ctr` based on the Ubuntu image, specifying Bash as its main process.


$ docker run --name ddd-ctr -it ubuntu:24.04 bash

Unable to find image 'ubuntu:24.04' locally
24.04: Pulling from library/ubuntu
51ae9e2de052: Download complete
Digest: sha256:ff0b5139e774bb0dee9ca8b572b4d69eaec2795deb8dc47c8c829becd67de41e
Status: Downloaded newer image for ubuntu:24.04

root@d3c892ad0eb3:/#

# List all running processes
The command pulls the Ubuntu image and attaches our terminal to the container's Bash shell process. Run a `ps` command to list all running processes.

Learn how to manage a container by terminating its main process, restarting the container, attaching to its shell, and exiting the container without stopping it.

About the Course

An Overview of Containers

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

Terminating the Main Process of a Container