Master everything you need to know about Docker containers to easily create, deploy, and run your applications with containers.

DevOps for Developers

By now, you've probably heard the buzz around Docker. It's fundamentally changed the development process and been adopted by software teams of all sizes, and for good reason: Docker makes it considerably easier to create, deploy, and run applications with the use of containers.

Docker is here to stay, and is becoming one of the most in-demand technologies on the market. Mastering it now will help you produce better software, level up your career, and stand out from the crowd. Get started today.

Docker for Developers

Docker downloads it from a default registry

Docker uses an image that is present on our disk

What happens when we try to create a container using an image that isn't present on our disk?

What happens when we try to create a container using an image that isn’t present on our disk?

Asks Docker to create and run a container based on the hello-world image

Asks Docker to run the hello-world container

What does the following command do?

```
docker run hello-world
```



What does the following command do?
<pre><code>docker run hello-world
</code></pre>

Which command gets detailed information about a specified container regardless of if it is running or stopped?

Which command gets detailed information about a specified container regardless of if it is running or stopped?

Which command deletes a specified container?

Which command deletes a specified container?

Which command lists the containers which have stopped?

Which command lists the containers which have stopped?

Deletes all the containers which are not in use, but prompts for confirmation before doing so

Deletes all containers regardless of if they are in use or not

Deletes all the containers which are not in use without prompting for confirmation

What does the following command do?

```
docker container prune -f
```


What does the following command do?
<pre><code>docker container prune -f
</code></pre>

Which switch do we use with the *docker run* command to disconnect a long-lived container from the command-line?

Which switch do we use with the docker run command to disconnect a long-lived container from the command-line?

Which of the following commands will I use to state that I want my machine to listen for incoming connections on port **8085** and route them to port **80** inside a container that runs NGINX?

Which of the following commands will I use to state that I want my machine to listen for incoming connections on port 8085 and route them to port 80 inside a container that runs NGINX?

Map a directory inside a specified container to a persistent storage

Ensure that any data written to the database directory inside a specified container is actually written to a directory on the host system

What are volumes used for in Docker?

The *docker run* command first looks for an image locally. Which command forces an image to be downloaded from Docker Hub regardless of if it is already present on your local disk or not?

The docker run command first looks for an image locally. Which command forces an image to be downloaded from Docker Hub regardless of if it is already present on your local disk or not?

Each container is like a new machine regardless of if it's made using the same image or not.

Each container is like a new machine regardless of if it’s made using the same image or not.

---

Now that we know how to use Docker images, let's learn how to create them in the next chapter.

In the following quiz, you will be tested on concepts you learned in this chapter.

Before We Begin

Before Getting Started

Why Docker?

Get Docker up and Running

Basic Concepts

Use Docker Images

Create Docker Images

Publish Docker Images

Forget SDK Installs

Docker with Common Development Profiles

More About Running Containers

Conclusion

Quiz