ssh-keyscan

Collect SSH host keys

low risk

interactive breakdown — edit the command and press Explain

$

⚠ Risks & cautions

Blindly trusting scanned keys defeats host verification — compare fingerprints out-of-band.

What it does

Fetches public host keys for known_hosts.

Examples

ssh-keyscan -t ed25519 host >> ~/.ssh/known_hostsAdd a host key · explain & risk-check →

Related

Open the full explainer →More in Users, Permissions & Security

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