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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

**(True or False)** Containerizing is the process of configuring an application to run as a container.

(True or False) Containerizing is the process of configuring an application to run as a container.

What is the valid name for the instruction file that Docker uses to build images? 

What is the valid name for the instruction file that Docker uses to build images?

How many additional layers will the following Dockerfile add on top of the `python:3.8` Docker image?


```Dockerfile
FROM python3.8
LABEL maintainer="Educative"
RUN pip3 install numpy keras tensorflow
COPY . /src
EXPOSE 8000
ENTRYPOINT ["python3", "./main.py"]
```

How many additional layers will the following Dockerfile add on top of the <code>python:3.8</code> Docker image?
<pre><code class="language-Dockerfile">FROM python3.8
LABEL maintainer=&quot;Educative&quot;
RUN pip3 install numpy keras tensorflow
COPY . /src
EXPOSE 8000
ENTRYPOINT [&quot;python3&quot;, &quot;./main.py&quot;]
</code></pre>

Docker needs which of the following information to push an image? 

Docker needs which of the following information to push an image?

Is this a valid Dockerfile?

```Dockerfile
FRoM alpine

rUN apk add --update nodejs npm

cOPY . /src

RUN  npm install

ExPOSE 8080

ENTRYPOINT ["node", "./app.js"]

```


Is this a valid Dockerfile?
<pre><code class="language-Dockerfile">FRoM alpine

rUN apk add --update nodejs npm

cOPY . /src

RUN npm install

ExPOSE 8080

ENTRYPOINT [&quot;node&quot;, &quot;./app.js&quot;]

</code></pre>

```Dockerfile
FROM ubuntu:latest
RUN apt-install python3-pip
RUN pip3 install numpy tensorflow keras
```

```Dockerfile
FROM ubuntu:latest
RUN apt-install python3-pip
RUN pip3 install tensorflow
RUN pip3 install keras
RUN pip3 install numpy 
```

```Dockerfile
FROM ubuntu:latest
RUN apt-install python3-pip
RUN pip3 install numpy 
RUN pip3 install keras
RUN pip3 install tensorflow
```

Suppose a Docker host has built an image from the following Dockerfile:

```Dockerfile
FROM ubuntu:latest
RUN apt-install python3-pip
RUN pip3 install numpy 
RUN pip3 install keras
```
Which Dockerfile best leverages the cache of that Docker host?

Suppose a Docker host has built an image from the following Dockerfile:
<pre><code class="language-Dockerfile">FROM ubuntu:latest
RUN apt-install python3-pip
RUN pip3 install numpy 
RUN pip3 install keras
</code></pre>
Which Dockerfile best leverages the cache of that Docker host?

**(Select all that apply.)** Containerizing an app creates an image containing which of the following?

(Select all that apply.) Containerizing an app creates an image containing which of the following?

Which Dockerfile instruction specifies the base image?

Which Dockerfile instruction specifies the base image?

Where does the `docker push` command save images by default?

Where does the <code>docker push</code> command save images by default?

**(Select all that apply.)** Which Dockerfile instruction creates new image layers?

(Select all that apply.) Which Dockerfile instruction creates new image layers?

Test your knowledge of containerizing an application.

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

Quiz: Containerizing an Application