Docker Hub public and private repos - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a public repository on Docker Hub?

A public repository on Docker Hub is a storage space for Docker images that anyone can access and download without needing special permissions.

beginner

What is a private repository on Docker Hub?

A private repository on Docker Hub is a storage space for Docker images that only authorized users can access, keeping the images hidden from the public.

intermediate

How do you push an image to a private Docker Hub repository?

First, log in with 'docker login'. Then tag your image with your Docker Hub username and repo name. Finally, use 'docker push username/repo:tag' to upload it.

beginner

Why would you choose a private repository over a public one?

You choose a private repository to keep your Docker images secure and restrict access to trusted users only, protecting sensitive or proprietary software.

beginner

What command do you use to log in to Docker Hub from the command line?

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

Which Docker Hub repository type allows anyone to pull images without logging in?

A Public repository

B Private repository

C Local repository

D Encrypted repository

Public repositories are open for anyone to access and download images without authentication.

What is the first step before pushing an image to a private Docker Hub repo?

A Run 'docker logout'

B Run 'docker build'

C Run 'docker pull'

D Run 'docker login'

You must log in with 'docker login' to authenticate before pushing images.

How do you make a Docker Hub repository private?

A Use a special Docker CLI command

B Set repository visibility to private in Docker Hub settings

C Push images with a secret tag

D Encrypt the image before pushing

Repository visibility is controlled in Docker Hub's web interface settings.

Which command tags a local image for pushing to Docker Hub?

A docker build username/repo

B docker push local-image

C docker tag local-image username/repo:tag

D docker pull username/repo

The 'docker tag' command assigns the correct name for pushing to Docker Hub.

What is a key benefit of using private Docker Hub repositories?

A Control who can access your images

B Unlimited free storage

C Faster image downloads

D Automatic image building

Private repos let you restrict access to trusted users only.

Explain the difference between public and private Docker Hub repositories and when you might use each.

Think about who can see and download the images.

Describe the steps to push a Docker image to a private repository on Docker Hub.

Start with authentication, then prepare the image name, then upload.