Challenge ·Easy

Label a Container Image Using ctr

Ivan Velichko
by  Ivan Velichko · on
Containers
Learn how to label container images using the ctr command.
#container-image#containerd#ctr

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An easy one - label any local image with the practice=matter pair.

Hint 1

To label an image with ctr, you need to pull it first.

Hint 2

Feel a bit stuck? ctr image label --help is your friend.

How to Author Challenges on iximiuz Labs

Instead of providing a subpar online editing experience, iximiuz Labs offers a helper CLI tool called labctl, allowing you to use your favorite text editor (or a full-featured IDE) to write content from the comfort of your local machine.

Install labctl CLI

curl -sf https://labs.iximiuz.com/cli/install.sh | sh

This will download and install the latest version of the labctl CLI. You only need to do this once per workstation.

Authorize labctl

labctl auth login

This will open a browser window asking you to authorize labctl to access your account. You need to do it after a fresh install of labctl and repeat it whenever the auth session expires.

Pull challenge content

labctl content pull challenge labeling-container-images-with-ctr

This will create a local copy of the challenge content in a directory named labeling-container-images-with-ctr. You only need to do this once per challenge.

Stream your changes

labctl content push -fw challenge labeling-container-images-with-ctr

Run this command in a separate terminal to continuously upload your changes to the server while editing the challenge in your favorite text editor or IDE.

You can also use labctl to create, list, and delete your content. Learn more about the available commands: labctl content --help

Start challenge