WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!今天用scp命令复制时，提示如下错误：@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 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 is25:ab:2e:55:30:11:a0:84:d8:45:2f:5b:e2:47:eb:1e.Please contact your system administrator.Add correct host key in /root/.ssh/known_hosts to get rid of this message.Offending key in /root/.ssh/known_hosts:1RSA host key for 192.168.1.240 has changed and you have requested strict checking.Host key verification failed.lost connection
开始我以为是命令错误，仔细一看，原来是密钥验证错误，可能是我的账号信息做过更改。
找到该用户家目录下的如下的ssh连接文件夹：1. cd ~/.ssh/2. vi known_hosts3. 找到和远程主机ip一致的密钥保存信息，直接dd删除那一行信息，然后保存退出4. 重新连接，输入密码，发现连接成功
问题解决
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详细请参考：http://www.codesky.net/article/201107/133930.html