Add a host key to known_hosts

bash

ssh-keyscan -H example.com >> ~/.ssh/known_hosts

Explanation

Append a scanned host key to your known_hosts file.

Learn the surrounding workflow

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

Same sheet · prioritizing Authorized Keys and Host Keys

Fetch a server host key without logging in.

Open In sheetbashsame section

Search known_hosts for a specific host entry.

Open In sheetbashsame section

Delete stale host key entries for a host.

Open In sheetbashsame section

Hash hostnames in known_hosts for privacy.

Open In sheetbashsame section

Append your public key to a remote account's authorized_keys.

Open In sheetbashsame section

Use ssh-copy-id with a non-default SSH port.

Open In sheetbashsame section