远程连接主机发现密匙发生变化，
Add correct host key in /var/root/.ssh/known_hosts to get rid of this message.
Offending key in /var/root/.ssh/known_hosts:1
RSA host key for 192.168.1.203 has changed and you have requested strict checking.
Host key verification failed.
执行此命令即可解决。
sh-keygen -R 192.168.1.XXX(
远程服务器的IP)