Installing Docker - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to update the package list before installing Docker.

Docker

sudo apt-get [1]

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

Aremove

Bupdate

Cupgrade

Dinstall docker

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'install' instead of 'update' causes errors because packages are not refreshed.

The apt-get update command refreshes the package list so you get the latest versions.

2fill in blank

medium

Complete the command to install Docker Engine on Ubuntu.

Docker

sudo apt-get install -y [1]

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

Adocker-ce

Bdocker-compose

Cdocker-swarm

Ddocker-hub

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'docker-compose' installs a different tool for multi-container apps.

The package docker-ce is the Docker Community Edition engine.

3fill in blank

hard

Fix the error in the command to add Docker’s official GPG key.

Docker

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo [1] --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

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

Agpg --import

Bapt-key add

Cgpg2

Dgpg

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'apt-key add' is deprecated and causes warnings.

The gpg --dearmor command converts the key to a format apt can use.

4fill in blank

hard

Fill both blanks to add the Docker repository to apt sources.

Docker

echo "deb [arch=[1] signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu [2] stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

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

Aamd64

Barm64

Cfocal

Dbionic

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong architecture or Ubuntu codename causes repository errors.

The architecture is amd64 for most PCs, and focal is the Ubuntu 20.04 codename.

5fill in blank

hard

Fill all three blanks to verify Docker installation by running the hello-world container.

Docker

sudo docker [1] hello-world && sudo docker [2] && sudo docker [3]

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

Arun

Bps

Cversion

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' instead of 'run' for the first command causes errors.

docker run hello-world runs a test container, docker ps lists running containers, and docker version shows Docker version info.