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Cleaning up after docker.

I was working on my personal computer and got a low disk space warning while playing around with some Docker images. So I went back to this blog post, Keeping the whale happy, which is generally good.

I wanted to just clean out everything. Some notes: the commands in this tutorial, if there are two docker commands, and you call docker with sudo, you need sudo in front of all of them.

I used the blank slate option, “delete stopped containers, and volumes and networks that are not used by containers”:

sudo docker system prune -a

I was able to get back 50GB of disk space! So I also added this script to my crontab to clean things up on a regular basis:

#!/bin/bash
docker rmi $(docker images -q -f dangling=true)
docker volume rm $(docker volume ls -qf dangling=true)

(Instructions in the post.)

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