Answer
It removes unused images, networks, volumes, and stopped containers that accumulate over time.
Quick Answer
docker system prune removes: stopped containers, dangling images (untagged layers), unused networks, and build cache. All of these accumulate silently during development — especially build cache, which can grow to tens of GBs. Pruning is safe during development; in production, be more targeted (docker image prune, docker volume prune).
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.
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Source: SugharaIQ