Script to scan OpenSSH host key and known_hosts files for shared keys from server hoster Hetzner
./ed25519hetzner [files]
If script runs with user rights and no files are given the script checks the user's known_hosts and if available the system's ed25519 key.
If script runs as root it checks the root's, all user's known_hosts and the system's ed25519 key.
Between April 2015 and December 2015 Hetzner preinstallation images contained a shared Ed25519 key.