ssh.config

# When you get this: "The authenticity of host 'HOSTNAME (IP)' can't be established.", 
# including a fingerprint, and then "Are you sure you want to continue connecting (yes/no)?".
# This is due to a hostname check previously accepted fingerprint/hostname. 
# This isn't helpful during automated tests, turn it off with this:
StrictHostKeyChecking=no

# get fingerprint of server
ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key.pub

# The following useful in /etc/ssh/ssh_config
Host *
StrictHostKeyChecking no
UserKnownHostsFile=/dev/null
LogLevel ERROR