How to remove docker images based on name?

docker images actually uses the first positional argument as an image name to filter for. No grep's and awk's required. The -q option will return only the matching images IDs which can be fed to docker rmi.

docker rmi --force $(docker images -q 'imagename' | uniq)

The uniq is required to remove duplicates, in case you have the same image tagged differently.

docker rmi $(docker images --format '{{.Repository}}:{{.Tag}}' | grep 'imagename')

Slightly more exact version - grepping only on the repository name:

docker rmi $(docker images --format '{{.Repository}}:{{.Tag}}' | grep 'imagename')

Try the following:

docker rmi $(docker images | grep 'imagename')

or, alternatively:

docker rmi $(docker images 'completeimagename' -a -q)

In Windows PowerShell:

docker rmi $(docker images --format "{{.Repository}}:{{.Tag}}"|findstr "imagename")