CompTIA Linux+ (XK0-005) — Question 56

A Linux administrator found many containers in an exited state. Which of the following commands will allow the administrator to clean up the containers in an exited state?

Answer options

• A. docker rm --all
• B. docker rm $(docker ps -aq)
• C. docker images prune *
• D. docker rm --state exited

Correct answer: B

Explanation

The correct option is B because it uses 'docker rm' in conjunction with '$(docker ps -aq)', which lists all container IDs, including those that are exited, and removes them. Option A is incorrect because 'docker rm --all' is not a valid command. Option C is unrelated as it pertains to cleaning up images, not containers. Option D is also incorrect since 'docker rm --state exited' is not a valid syntax for removing exited containers.