SSH Known Hosts

ssh -o StrictHostKeyChecking=no user@host

Remove host from known_hosts file

ssh-keygen -R <host>,<ip-address>

Add hosts to known_hosts

ssh-keyscan -H <host>,<ip-address>

ssh-keyscan -t rsa -H <host>

ssh-keyscan -H <host>,<ip-address> >> ~/.ssh/known_hosts