ChromeOS

SSH Known Hosts löschen

https://www.gaggl.com/2015/07/chromeos-removing-ssh-known_hosts-from-chromebook/
You can find the index of the offending host entry reported by ssh if the connection fails (see above: “Offending ECDSA key in /.ssh/known_hosts:7”). Then you can open the JavaScript console (CTRL +Shift +J) and type the following into the console.

term_.command.removeKnownHostByIndex(INDEX);
Replace INDEX with the number obviously.

To clear all the known hosts:
term_.command.removeAllKnownHosts();

Two simple ways to get to the Chrome* OS shell
Default Passwort für User "chronos": chrome
Chronos Passwort ändern