Cleaning Things Up
To delete individual containers use the command
docker container rm [ID-OF-CONTAINER].
To list only the IDs for all containers use the command
docker container ls -aq. The
-aq flag specifies that all container IDs should be listed.
To delete all containers run the command
docker container rm $(docker container ls -aq). Note that this is the bash command. If you are using a different shell your command may be slightly different.
docker container ls -a to verify that all containers are deleted.
Similarly you can list images using
docker image ls and delete individual images using the command
docker image rm [NAME-OF-IMAGE].
Docker prevents you from deleting images and containers that are still in use.