Removing containers in Docker - Cheat Sheet & Quick Revision

Recall & Review

beginner

What command is used to remove a single Docker container?

The command docker rm <container_id_or_name> removes a single stopped Docker container.

beginner

How do you remove all stopped Docker containers at once?

Use docker container prune to remove all stopped containers in one command.

intermediate

What option allows you to force remove a running Docker container?

The -f or --force option with docker rm forces removal of a running container by stopping it first.

beginner

What happens if you try to remove a running container without the force option?

Docker will return an error saying the container is running and cannot be removed unless you stop it or use the force option.

intermediate

How can you remove multiple containers at once using their IDs or names?

You can list multiple container IDs or names separated by spaces after docker rm, like docker rm container1 container2.

Which command removes all stopped Docker containers?

A docker rm --all

B docker rm -f all

C docker stop all

D docker container prune

The docker container prune command removes all stopped containers safely.

What does the -f option do with docker rm?

A Filters containers by name

B Forces removal of a running container

C Formats output

D Finds containers by ID

The -f option forces Docker to stop and remove a running container.

What happens if you try to remove a running container without -f?

A Docker returns an error

B Container is removed immediately

C Container is paused

D Container is renamed

Docker will not remove a running container without the force option and will show an error.

How do you remove multiple containers at once?

A docker rm container1 container2

B docker rm -all

C docker stop container1 container2

D docker rm --batch

You list multiple container names or IDs separated by spaces after docker rm.

Which command removes a single stopped container named 'webapp'?

A docker rm -f webapp

B docker stop webapp

C docker rm webapp

D docker container prune webapp

Use docker rm webapp to remove a stopped container named 'webapp'.

Explain how to safely remove Docker containers that are no longer needed.

Think about stopping containers and batch removal commands.

Describe what happens if you try to remove a running container without forcing it.

Consider Docker's safety checks before removal.