如何调试SSH服务？

流浪者

通过F-SECURE SSH CLIENT，用ROOT登录，我的调试结果如下，请问那里出不问题？

[root@localhost root]# gdb /usr/sbin/sshd
GNU gdb Red Hat Linux (5.2.1-4)
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This GDB was configured as "i386-redhat-linux"...
(no debugging symbols found)...
(gdb) run -d
Starting program: /usr/sbin/sshd -d
debug1: sshd version OpenSSH_3.4p1
debug1: private host key: #0 type 0 RSA1
debug1: read PEM private key done: type RSA
debug1: private host key: #1 type 1 RSA
debug1: read PEM private key done: type DSA
debug1: private host key: #2 type 2 DSA
socket: Address family not supported by protocol
debug1: 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.

Program exited with code 0377.
(gdb)