Searching for images in Docker - Cheat Sheet & Quick Revision

Recall & Review

beginner

What command do you use to search for Docker images on Docker Hub?

You use docker search <image-name> to find images on Docker Hub.

beginner

What does the docker search command show by default?

It shows a list of image names, descriptions, number of stars, and whether the image is official or automated.

intermediate

How can you filter Docker search results to show only official images?

Use the --filter=is-official=true option with docker search.

beginner

What does the 'stars' column represent in Docker search results?

Stars show how many users liked or recommended the image, indicating popularity.

beginner

Why is it important to check if a Docker image is 'official' when searching?

Official images are maintained by Docker or trusted publishers, so they are more reliable and secure.

Which command lists Docker images matching a search term?

A docker images <image-name>

B docker list <image-name>

C docker search <image-name>

D docker find <image-name>

The correct command to search images on Docker Hub is docker search <image-name>.

What does the --filter=is-official=true option do in docker search?

A Shows only official images

B Shows only images with stars

C Shows only automated builds

D Shows only images with latest tag

This filter limits results to official images maintained by Docker or trusted publishers.

In Docker search results, what does the 'stars' column indicate?

A Popularity or user recommendations

B Number of downloads

C Image size

D Number of tags

Stars reflect how many users liked or recommended the image.

Which of these is NOT shown by default in docker search output?

A Image description

B Image size

C Number of stars

D Whether image is official

Image size is not shown in the search results by default.

Why should you prefer official images when searching on Docker Hub?

A They are always smaller in size

B They have more tags

C They are free to use

D They are maintained and more secure

Official images are maintained by trusted sources, making them more reliable and secure.

Explain how to search for Docker images and filter results to show only official images.

Think about the command and the filter flag you can add.

Describe what information you get when you run docker search and why it is useful.

Consider what each column means and how it helps pick an image.