http://blog.csdn.net/yuanxuran0101/article/details/6158702
http://blog.csdn.net/zanget/article/details/5851725
1.vi /etc/ssh/ssh_conf
找到
GSSAPIAuthentication yes
改为
GSSAPIAuthentication no
2.vi /etc/resolv 的 DNS改为可用的
3.vi /etc/hosts
4.将UseDNS 的缺省值由yes修改为no,并重启sshd