今天在使用scp命令上传文件到远端服务器时报如下错误，（ssh命令连接到远程服务器时也报同样的错误）：

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@    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 the RSA host key has just been changed.The fingerprint for the RSA key sent by the remote host is38:26:00:4a:96:cc:43:f4:e8:99:a6:9b:d4:f8:55:e8.Please contact your system administrator.Add correct host key in /home/rusky/.ssh/known_hosts to get rid of this message.Offending key in /home/rusky/.ssh/known_hosts:4RSA host key for 192.168.1.123 has changed and you have requested strict checking.Host key verification failed.lost connection

处理方法：

删除known_hosts文件即可。

rm  ~/.ssh/known_hosts