Thread by @DataScienceHarp

Do data scientists need to know @Docker?

Most definitely. But you don't need to know everything. When it comes to Docker images, here are the five commands you absolutely must know.

#100DaysOfCode #66DaysOfData

🧵👇🏽

1/ docker image pull

This command downloads images. You can pull images from repositories inside of remote registries. By default, images are pulled from @Docker Hub.

This command will pull images tagged as `latest` by default.

2/ docker image ls

This command lists all of the images stored in your @Docker hosts local image cache. You can use the `--digest` option to get the SHA256 hash code of the image as well.

3/ docker image inspect

A powerful command that allows you to see all the nitty-gritty detail of an image.

The layer data, the metadata, all of it.

4/ docker manifest inspect

With this command you can inspect the manifest list of any image stored on @Docker hub.

For example, if you wanted to see the manifest list of the ubuntu image you can type: `docker manifest inspect ubuntu` to see it.

Side bar: a manifest is a list of image layers that is created by specifying one or more image names.

A @Docker image starts with a base layer, and as new changes are made and new content is added, new layers are added on top.

An image is a combo of all layers stack in order.

5/ docker image rm

You use this command to delete an image.

Note: if an image layer is shared by more than one image, that layer won't be deleted until all images that reference it have been deleted.

Also, you can't delete an image that is associated with a running container

Bonus:

Use `$ docker image rm $(docker image ls -q) -f` to delete all imaged on a @Docker host.

If you found this helpful, be sure to go back to the top and share it with your friends.

Smash that follow on my profile and hit the bell notification so you don't miss out on posts while you're at it.

https://twitter.com/DataScienceHarp/status/1508140379853402114

Huge shout out to @nigelpoulton - learned all this in his @Docker class on @EducativeInc

Be sure to checkout my thread for common @Docker container commands here:

https://twitter.com/DataScienceHarp/status/1508495228663042059