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 is 38:26:00:4a: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:4 RSA 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