使用SSH登錄某臺(tái)機(jī)器，有時(shí)因?yàn)閟erver端的一些變動(dòng)，會(huì)出現(xiàn)以下信息：

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @??? 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 50:e6:cb:58:bc:b7:a3:f6:e8:8f:46:a7:c1:5f:c2:df. Please contact your system administrator. Add correct host key in /home/cobyeah/.ssh/known_hosts to get rid of this message. Offending key in /home/cobyeah/.ssh/known_hosts:7 RSA host key for 192.168.0.4 has changed and you have requested strict checking. Host key verification failed.

（此處先不提及原理，只講處理方法，需要了解原因的請(qǐng)留言或找其他資料）

這時(shí)候的處理方法，有3種：
1. 刪除提示信息中，對(duì)應(yīng)的行數(shù)，例如上例，需要?jiǎng)h除/home/cobyeah/.ssh/known_hosts文件的第7行。

2. 刪除整份/home/cobyeah/.ssh/known_hosts文件。

3. 修改/etc/ssh/ssh_config文件的配置，以后則不會(huì)再出現(xiàn)此問(wèn)題

StrictHostKeyChecking no UserKnownHostsFile /dev/null

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