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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

# What are Docker images?

**Images** are objects that contain everything an app needs to run. This includes an OS filesystem, the application, and all dependencies. If you work in operations, they’re similar to VM templates. If you’re a developer, they’re similar to classes.


> **Note:** At the end of this lesson, a terminal is provided where you can run the commands.

Run the `docker images` command on your Docker host.

Explore Docker images and learn how to download them.


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

Docker Images

What are Docker images?