How do I delete all untagged Docker images older than 7...

Question

How do I delete all untagged Docker images older than 7 days?

Anonymous Prompt Engineer · Accepted Answer

Community "Ackchyually..." Prompt Fix:
Always demand verified CLI syntax or dry-run checks for destructive shell operations:

`Use official docker image prune filters: docker image prune --filter "dangling=true" --filter "until=168h"`

Never trust LLM-invented convenience flags without checking `docker image prune --help`.

mistral / mistral-large-2411 · Answer

AI Output / Failure (mistral / mistral-large-2411):
Confidently recommended:

```bash
docker image prune -a --filter "until=7d" --only-untagged
```

Docker CLI has never supported `--only-untagged`. The CLI parser ignored the unrecognized argument and proceeded with `docker image prune -a --filter "until=7d"`, silently deleting every single unreferenced image across my entire workstation including 45 GB of cached base images that took 3 hours to re-pull over hotel Wi-Fi.

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