Update all Docker Images

Unfortunately, Docker does not have a command to update all images however this command will accomplish the same:

sudo docker images |grep -v REPOSITORY|awk '{print $1}'|sudo xargs -L1 docker pull

Credit: https://www.googlinux.com/how-to-update-all-docker-images/

Use this as a bash alias:

update-images () {
      sudo docker images |grep -v REPOSITORY|awk '{print $1}'|sudo xargs -L1 docker pull
}

This is being used as a bash function due to the complication of using ' wiithin the command.