Helpful Docker Commands

A few helpful commands for managing your Docker environment

Inspect your Docker images

e.g.

docker image inspect 5871e133549f

or to find out what architecture the image is built for

lee-169142:~ sserbin$ docker image inspect 5871e133549f | grep Architecture
        "Architecture": "arm64",

Cleanup environment

You can cleanup (prune) your environment to remove any images that are unused by taking up space on your computer

To cleanup unused images:

docker image prune

You can also remove specific images. E.g.
First do

docker image ls

Then identify the ID of the image to remove, e.g. 2bb301e6a312

you can then delete by typing

docker image rm -f 2bb301e6a312

To cleanup old volumes:

docker volume prune

You can remove any containers you aren't using, however (warning!!) this would remove your ELM or Jupyter containers if not running:

docker container prune

You can cleanup everything at once using:

docker system prune

The docker system prune command is a shortcut that prunes images, containers, and networks. Volumes are not pruned by default, and you must specify the --volumes flag for docker system prune to prune volumes, e.g.

docker system prune --volumes

Save Docker images to tar or tar.gz files and re-load for .tar/.tar.gz archive file

https://docs.docker.com/engine/reference/commandline/save/

e.g. Save your local copy of the ELM Docker image to a tar file

docker save serbinsh/ngeearctic_elm_containers:elm_v2-for-ngee_multiarch > testdocker.tar

e.g. Save your local copy of the ELM Docker image to a tar.gz file

docker save serbinsh/ngeearctic_elm_containers:elm_v2-for-ngee_multiarch | gzip > testdocker.tar.gz

Load Docker image from file
https://docs.docker.com/engine/reference/commandline/load/

e.g. Reload from a tar.gz file

docker load < testdocker.tar.gz

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