[Docker] Magic command when you want to wipe out none image

TL;DR

% docker images | grep none | xargs docker rmi `awk '{ print $3 }'`

When a conflict occurs and cannot be deleted

Error response from daemon: conflict: unable to delete 78ef4af0ce83 (must be forced) - image is referenced in multiple repositories

If you get an error like the one above, use -f to forcibly delete it.

% docker images | grep none | xargs docker rmi -f `awk '{ print $3 }'`

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