SSH 執行問題

WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!    

IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
0d:4f:e1:7f:e3:29:14:4a:98:68:97:4e:65:86:a0:ed.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:1
ECDSA host key for 192.168.10.254 has changed and you have requested strict checking.
Host key verification failed.
root@nora:/test# sh clear_iptable.sh
root@nora:/test# ssh -l -L 192.168.10.254

如果出現以上訊息

就刪除以下檔案
/root/.ssh/known_hosts