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It's a newbie question.

Given a sample .NET Core application. Using tutorials, I've built a docker image and I can run it via docker run at my local machine (Win10). Docker uses Linux containers.

Now I want to obtain this image somehow at my testing machine (Ubuntu-18.04, docker is installed).

How to do this?
Can docker image be redistributed as a file, using simple copying?
Unfortunately, all reading I've found ends up with running image locally.

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For production machines with limited access to internet, I docker save the built image, copy, and docker load it elsewhere. This is painful but unavoidable sometimes.

You can also use docker registry. GitLab provides their own registry which can be integrated in your work flow. Regardless of the provider, this allows you to docker pull the image from other machines


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