Answers for "docker remove image by name"

delete all docker images

docker system prune -a

remove docker image

docker image rm [image id]

docker remove image its name

docker rmi centos  
#centos is the name of the docker image

how to delete image docker

docker image rm [OPTIONS] IMAGE_ID [IMAGE_ID...]
#[OPTIONS]
--force , -f		Force removal of the image
--no-prune		Do not delete untagged parents

docker remove image

docker image rm [OPTIONS] IMAGE [IMAGE...]

remove downloaded docker images

docker image rm [OPTIONS] IMAGE [IMAGE...]