What does journald do?

journald control journalctl --vacuum-* and storage settings.

Is journald dangerous?

MEDIUM risk. Vacuuming deletes logs. Vacuum is permanent — forensic evidence may be lost.

journald (advanced)

journald control

medium risk

interactive breakdown — edit the command and press Explain

⚠ Risks & cautions

Vacuum is permanent — forensic evidence may be lost.

What it does

journalctl --vacuum-* and storage settings.

Examples

journalctl --disk-usageUsage · explain & risk-check →

journalctl --vacuum-time=7dDelete older logs · explain & risk-check →

journalctl

Open the full explainer →More in Debugging & Performance

Reference text is hand-written and may be incomplete — check man journald for your version. Test destructive commands on a non-production system first.