Docker update script to ensure docker containers are updated, dangling unused containers are nuked, and unused images purged.

docker-update.sh

#!/bin/bash

# Ensure docker is updated, and dangling / unused images are purged
# Restarts containers when done.
# Author: L. Sheed


# Delete all dangling (unused) images
docker images -q -f dangling=true | xargs --no-run-if-empty docker rmi 

#prune  anything unused and remaining 
docker image prune -fa

# Update all docker containers
docker images |grep -v REPOSITORY|awk '{print $1}'|xargs -L1 docker pull 

#restart any killed containers
docker-compose up -d --remove-orphans
docker restart $(docker ps -a -q)