Answer
Dangling images are untagged leftovers; unused images are tagged but not referenced by containers.
Quick Answer
A dangling image is an untagged layer — it was previously tagged but got replaced when you rebuilt. It has no name or tag (:) and nothing uses it. An unused image has a tag but no running or stopped container is using it. docker image prune removes dangling images; --all removes unused ones too.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
Want to bookmark, take notes, or join discussions?
Sign in to access all features and personalize your learning experience.
Source: SugharaIQ