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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

# Execute commands in running containers
The `docker exec` command  is used to execute commands in running containers, and it has two modes:

- Interactive
- Remote execution

Interactive sessions connect your terminal to a shell process in the container and behave like remote SSH sessions. Remote execution mode lets you send commands to a running container and prints the output to your local terminal.

Run the following command to start an interactive session by creating a new shell process (`sh`) inside the `webserver` container and connecting our terminal to it. The `-it` flag makes it an _interactive exec session_, and the `sh` argument starts a new `sh` process inside the container. `sh` is a minimal shell program installed in the container.


Learn how to execute commands in running Docker containers using the docker exec command.

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

Connecting to a Container

Execute commands in running containers