ssh scp 时报错

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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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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
32:89:95:bd:61:d7:d9:a5:cf:9a:44:f4:e0:52:30:38.
Please contact your system administrator.
Add correct host key in /home/glq/.ssh/known_hosts to get rid of this message.
Offending key in /home/glq/.ssh/known_hosts:2
RSA host key for 172.20.120.137 has changed and you have requested strict checking.

Host key verification failed.

遇到这样的情况是因为 /home/glq/.ssh/known_hosts 这个文件中保存的host key和现在的不一样。解决办法很简单，把 /home/glq/.ssh/known_hosts这个文件删除就行了。

rm /home/glq/.ssh/known_hosts

重新scp，搞定。