Docker Hub as image registry - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Docker Hub?

Docker Hub is a cloud-based service where you can store and share Docker container images with others.

beginner

How do you push a Docker image to Docker Hub?

First, tag your image with your Docker Hub username and repository name, then use the command docker push username/repository:tag.

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What command logs you into Docker Hub from the command line?

Use docker login and enter your Docker Hub username and password when prompted.

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Why do you need to tag a Docker image before pushing it to Docker Hub?

Tagging tells Docker where to send the image by specifying the repository and optionally the version, so Docker Hub knows how to store it.

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What is the difference between a public and a private repository on Docker Hub?

Public repositories can be accessed and pulled by anyone, while private repositories are restricted and require permission to access.

Which command do you use to upload a Docker image to Docker Hub?

A docker push

B docker pull

C docker run

D docker build

docker push uploads your image to Docker Hub.

What must you do before pushing an image to Docker Hub?

A Create a Dockerfile

B Run the image locally

C Delete the image

D Tag the image with your Docker Hub repository name

You must tag the image so Docker knows where to push it.

How do you authenticate with Docker Hub from the command line?

A docker push

B docker login

C docker pull

D docker logout

docker login lets you enter your Docker Hub credentials.

What is a private repository on Docker Hub?

A A repository only accessible to authorized users

B A repository anyone can access

C A repository that stores only images you build locally

D A repository that automatically deletes images

Private repositories restrict access to selected users.

Which of these is NOT a feature of Docker Hub?

A Storing Docker images

B Sharing images publicly or privately

C Running containers in the cloud

D Automated builds from GitHub

Docker Hub stores images but does not run containers.

Explain the steps to push a Docker image to Docker Hub.

Think about logging in, tagging, then pushing.

Describe the difference between public and private repositories on Docker Hub.

Consider who can see and use the images.