Update All Docker Images In One Line

The scripts below helps to maintain docker images. It keep images in updated and removes the outdates.

Do In bash/zsh/dash/sh

for img in $(docker images | sed '1d' | awk '{print $1":"$2}' | sort)
do
    echo "#### Updating docker image $img ####"
    docker pull "$img"
    echo
done
for img in $(docker images | grep '<none>' | awk '{print $3}')
do
    echo "#### Removing outdated docker image $img ####"
    docker rmi "$img"
    echo
done

Do In fish

for img in (docker images | sed '1d' | awk '{print $1":"$2}' | sort)
    echo "#### Updating docker image $img ####"
    docker pull "$img"
    echo
end
for img in (docker images | grep '<none>' | awk '{print $3}')
    echo "#### Removing outdated docker image $img ####"
    docker rmi "$img"
    echo
end

Automatic In cron

# Update docker images & remove outdated docker images
@daily for i in $(docker images | sed '1d' | awk '{print $1":"$2}' | sort); do docker pull "$i"; done; for i in $(docker images | grep '<none>' | awk '{print $3}'); do docker rmi "$i"; done