SFTP host key verification failed
Why SSH host key verification fails and how to resolve known_hosts conflicts.
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Host key verification errors occur when the server's SSH key does not match the client's known_hosts entry.
Common causes
- Server host key changed
- Man-in-the-middle protection triggered
- Old known_hosts entry
Fix checklist
- Verify the new host key with the server administrator.
- Remove the old entry from ~/.ssh/known_hosts.
- Reconnect to store the updated host key.
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