docker image prune — remove unused images
Quick Answer
# Remove only dangling (untagged) images — safe
docker image prune
# Remove ALL unused images (not referenced by any container)
docker image prune -a
# Skip the confirmation prompt
docker image prune -a -fUsage
Docker images pile up after repeated builds. Use prune to reclaim disk space.
Other causes & fixes
Check disk usage before pruning
docker system df
# TYPE TOTAL ACTIVE SIZE RECLAIMABLE
# Images 23 5 14.2GB 11.8GB (83%)
# Containers 3 2 1.2MB 600kB (50%)
# Local Volumes 8 3 2.1GB 1.5GB (71%)
# Build Cache ...Remove images older than N days
# Remove images unused for more than 48 hours
docker image prune -a --filter "until=48h"Delete a specific image
docker rmi my-image:latest
# Force-remove even if a container uses it
docker rmi -f my-image:latestRemove all images (nuclear option)
docker images -q | xargs docker rmi -fRelated