This page includes a myriad docker commands for reference.
Run ubuntu:latest image (will do docker pull automatically if you don't have it)
docker run -it --rm ubuntu:latest
Pull ubuntu:latest image
docker pull ubuntu:latest
Show currently installed images
docker images
Remove ubuntu:latest image (you can pull it again)
docker rmi ubuntu:latest
Rename a docker image from ubuntu:latest to myimage:latest (retag, then remove original image)
docker tag ubuntu:latest myimage:latest docker rmi ubuntu:latest