20.3.
20.3.1.
ssh penguin.example.net The authenticity of host 'penguin.example.net' can't be established. DSA key fingerprint is 94:68:3a:3a:bc:f3:9a:9b:01:5d:b3:07:38:e2:11:0c. Are you sure you want to continue connecting (yes/no)?
Warning: Permanently added 'penguin.example.net' (RSA) to the list of known hosts.
ssh username@penguin.example.net ssh penguin.example.net ls /usr/share/doc 