How can Docker images be shared between users?

Sharing Docker images between users is most effectively achieved by using a Docker registry like Docker Hub. Docker registries serve as centralized repositories where images can be stored, managed, and shared. When an image is pushed to a registry, it becomes accessible to anyone with the appropriate permissions and access credentials.

Using a registry automates the versioning and distribution of images, and it allows users to easily pull the images they need with just a command. This method is efficient and scalable, as multiple users can access the same images without the need for physical transfer methods or email attachments. Overall, it underscores a streamlined, collaborative approach to managing Docker images within teams or across organizations.

Other options, such as sending images via email or copying them to a USB drive, are prone to complications like file size limits, versioning issues, and reduced accessibility. Creating a shared network drive also poses challenges related to access control and image management that are neatly handled by a Docker registry.