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Dockerfile Linter

container-security-image-security-dockerfile-linting | Level: Easy  | Total Lab Runs: 0 | Premium Lab

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Dockerfile Linting is a process to check and modify the Dockerfile as per the industry's best practices.

Dockerfile-linter is a Dockerfile linter that you can use to quickly check if your Dockerfile follows the best practices for building efficient Docker images.

A Dockerfile is provided in the home directory of the root user (i.e. /root). Dockerfile-linter is installed on the machine.

Objective: Analyze the Dockerfile with Dockerfile-linter. Edit Dockerfile to remove all issues detected by Dockerfile-linter!


  • Use "dockerfilelinter" command to invoke Dockerfile-linter tool
  • vim and nano editors are installed on the machine and can be used to edit the Dockerfile 

The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:

  • Using automated scanners
  • Using brute force attacks
  • Denial of Service attacks
  • Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
  • Attacking the lab infrastructure

Users violating the above will be either temporarily or permanently banned from the website. 

If you are unsure about an activity, then please contact support to confirm that it is allowed on our website.

Technical Support for this Lab:

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