/usr/sbin/sshd2 하믄 아래와 같은 에러가 떨어집니다.
 잘되던건데.. 왜 이런에러가 뜨는지 ...
  sshd2: SSH Secure Shell 3.1.0 (non-commercial version) on i686-pc-linux-gnu
sshd2[25050]: WARNING: Host key pair is not specified, trying to use default 'ho
stkey'.
sshd2[25050]: FATAL: Creating listener failed: port 22 probably already in use!