Show journal disk usage

bash

journalctl --disk-usage

Explanation

Helps with log retention and cleanup decisions.

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Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

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Emit journal entries in JSON format.

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Human-readable JSON output.

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Display logs in short ISO format.

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Delete archived journals until under size limit.

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Delete archived logs older than a time window.

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Check journal file integrity.

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