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#!/bin/bash
# Shamelessly stolen from https://gist.github.com/eduardocardoso/82a629882ddb02ab3677
set -o errexit
echo "Removing exited docker containers..."
docker ps -a -f status=exited -q | xargs -r docker rm -v
echo "Removing untagged images..."
docker images --no-trunc | grep "<none>" | awk '{print $3}' | xargs -r docker rmi
echo "Removing unused docker images"
images=($(docker images | tail -n +2 | awk '{print $1":"$2}'))
containers=($(docker ps -a | tail -n +2 | awk '{print $2}'))
containers_reg=" ${containers[*]} "
remove=()
for item in ${images[@]}; do
if [[ ! $containers_reg =~ " $item " ]]; then
remove+=($item)
fi
done
remove_images=" ${remove[*]} "
echo ${remove_images} | xargs -r docker rmi
echo "Done"
@eduardocardoso
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I took the liberty to merge your improvement, thanks for the input

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