Method 1: The "Save and Load" Technique (Requires Two Machines)

Some servers are disconnected from the internet for security, requiring images to be "sneaked-in" via physical media.

If the machine you are downloading on doesn't have Docker installed, you can't use docker pull . Instead, use open-source scripts that communicate directly with the Docker Hub API. docker image save - Docker Docs

Environments that block the Docker daemon or lack a Docker client entirely.