Docker login and authentication - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to log in to Docker Hub.

Docker

docker [1]

Drag options to blanks, or click blank then click option'

Abuild

Bpush

Crun

Dlogin

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'docker push' instead of 'docker login'.

Using 'docker run' which starts containers, not login.

The docker login command is used to authenticate your Docker client to a Docker registry like Docker Hub.

2fill in blank

medium

Complete the command to log in to a private Docker registry at example.com.

Docker

docker login [1]

Drag options to blanks, or click blank then click option'

Alocalhost

Bdocker.io

Cexample.com

Dregistry.hub.docker.com

Attempts:

3 left

💡 Hint

Common Mistakes

Using the default Docker Hub URL instead of the private registry URL.

Leaving the registry URL blank when logging into a private registry.

To log in to a private registry, specify its URL after docker login. Here, example.com is the private registry address.

3fill in blank

hard

Fix the error in the command to log in with a username.

Docker

docker login -u [1]

Drag options to blanks, or click blank then click option'

Amyusername

B-p

Cpassword

D--password

Attempts:

3 left

💡 Hint

Common Mistakes

Putting password or flags instead of username after -u.

Confusing -u with -p.

The -u option expects the username. Here, myusername is the correct value to provide.

4fill in blank

hard

Fill both blanks to log in with username and password in one command.

Docker

docker login -u [1] -p [2]

Drag options to blanks, or click blank then click option'

Amyuser

Bmypassword

Cpassword123

Dadmin

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping username and password positions.

Using flags instead of actual username or password.

The -u flag is for username and -p is for password. Here, myuser and password123 are example credentials.

5fill in blank

hard

Fill all three blanks to create a Docker config file with authentication for a registry.

Docker

echo '{"auths": {"[1]": {"auth": "[2]"}}}' > [3]

Drag options to blanks, or click blank then click option'

Aexample.com

BdXNlcjpwYXNz

C~/.docker/config.json

Ddocker.io

Attempts:

3 left

💡 Hint

Common Mistakes

Using plain text credentials instead of base64 encoded string.

Writing to wrong file path.

Using wrong registry URL.

This command writes a JSON config file for Docker authentication. example.com is the registry, dXNlcjpwYXNz is the base64 encoded 'user:pass', and ~/.docker/config.json is the config file path.