localhost:/home/richard# /usr/sbin/sshd $SSHD_OPTS -ddddebug2: load_server_config: filename /etc/ssh/sshd_configdebug2: load_server_config: done config len = 665debug2: parse_server_config: config /etc/ssh/sshd_config len 665debug1: sshd version OpenSSH_4.3p2 Debian-9debug3: Not a RSA1 key file /etc/ssh/ssh_host_rsa_key.debug1: read PEM private key done: type RSAdebug1: private host key: #0 type 1 RSAdebug3: Not a RSA1 key file /etc/ssh/ssh_host_dsa_key.debug1: read PEM private key done: type DSAdebug1: private host key: #1 type 2 DSAdebug1: rexec_argv[0]='/usr/sbin/sshd'debug1: rexec_argv[1]='-ddd'debug2: fd 3 setting O_NONBLOCKdebug1: Bind to port 22 on ::.debug2: fd 3 setting O_NONBLOCKdebug1: Bind to port 22 on 0.0.0.0.Bind to port 22 on 0.0.0.0 failed: Address already in use.Cannot bind any address.localhost:/home/richard#