Docker Basics

docker --version # show Docker version
docker info # display system-wide information
docker system df # show disk usage

docker --help # list all commands
docker command --help # help for specific command

docker login # log in to Docker Hub
docker logout # log out from registry
docker search term # search Docker Hub for images

docker system prune # remove unused data
docker system prune -a # remove all unused images
docker system prune -af --volumes # remove everything unused