The Fundamentals of Docker Image Tags | Atomist Blog
blog.atomist.com › docker-image-tagsMar 31, 2021 · Docker tags are mutable named references to Docker images, much like branch refs in Git. They make it easy to pull and run images, and for image authors to roll out updates automatically. For example, to pull the latest Debian GNU/Linux image for the buster release: $ docker pull debian:buster. or similarly in the FROM line of in Dockerfiles:
docker tag | Docker Documentation
docs.docker.com › engine › referenceA tag name must be valid ASCII and may contain lowercase and uppercase letters, digits, underscores, periods and dashes. A tag name may not start with a period or a dash and may contain a maximum of 128 characters. You can group your images together using names and tags, and then upload them to Share images on Docker Hub.