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đŸŗDevOps â€ĸ Docker & ContainersVerified for Docker v24.0+ & v26.0+âąī¸ 1 minuteđŸŽ¯ Intermediate

Docker Prune All Unused Resources (Clean Disk Space)

Clean up gigabytes of reclaimed disk space by wiping dangling images, containers, networks, and unused cache.

Alex Chen
Alex ChenReviewed by Expert

Staff DevOps & Infrastructure Architect

📖3 min read
â€ĸ
📝520 words
â€ĸ
📅Updated 2026-10-28

Verified Command (Single-Click Copy)

Updated: 2026-10-28
bash
docker system prune -a --volumes
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📋 Prerequisites

Permanent Deletion Risk
  • ✓Docker Engine 17.06+
  • ✓Verified local volume backups

💡 Primary Use Cases

Low Host Disk Space / CI Server Bloat:

Reclaim 10GB-100GB of orphaned build layers.

# How It Works

Removes all stopped containers, all networks not used by at least one container, all images without at least one container associated with them (`-a`), and all build cache and anonymous/unmounted volumes (`--volumes`).

Expected Terminal Output

Deleted Containers:
98b2c4d12e4f

Deleted Volumes:
b5a26c4839...

Total reclaimed space: 14.82GB
âš ī¸

Gotcha & Common Pitfall

âš ī¸ CAUTION: Using `--volumes` will wipe dangling database persistent volumes! Double check you have backups before running in production.

⚡

Performance & Complexity

Time ComplexityO(N)
Space (Memory)Reclaims O(Disk Space)
Mutates OriginalYes (In-Place)

â„šī¸ Irreversible action for deleted volumes and untagged images.

✓

Environment & Version Support

Docker CLI
v17.06+Verified
Podman CLI
v4.0+Verified
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# Alternative Methods & Variations

Safe prune (keep unused named images)

Only wipes dangling untagged images and exited containers.

bash
docker system prune

🔍 People Also Ask (Related Quick Answers)

How to delete only dangling images in Docker?docker image prune
How to check Docker disk space usage?docker system df
?

Frequently Asked Questions about Docker Prune All Unused Resources (Clean Disk Space)

Will docker system prune delete my active running containers?â–ŧ

No. Docker will never delete containers that are in a "running" or "paused" state.

How do I bypass the confirmation prompt in CI/CD scripts?â–ŧ

Pass the -f or --force flag: "docker system prune -a --volumes -f".

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