【Docker】Save images and containers locally, load images and containers from local

Jul 22, 2017#Docker164

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This article discusses how to save and load Docker images and containers locally. It provides commands for saving and loading images, as well as importing images with a new name. It also mentions that images saved through containers do not retain the operation history, resulting in smaller file sizes. To run an image loaded through a container, specific commands need to be added during runtime. The article concludes with an example command for running a Ubuntu system image loaded through a container.

Commands for saving and loading images:

docker save imageID > filename
docker load < filename

Images saved through the image command will save the operation history and can be rolled back to previous versions.

Commands for saving and loading containers:

docker export containID > filename
docker import filename [newname]

Images saved through containers will not save the operation history, so the file size is smaller.
If you want to run an image loaded through a container, you need to add relevant commands when running.

For example, if I load an Ubuntu system image through a container, the command to run it is:

docker run -it ubuntu:container /bin/bash

This will enter the terminal of the Ubuntu system.