重新安装ubuntu11.04之后，用ssh从远程主机下载文件下来时报错

[小强想和你]

[jianqiang@pf htdocs]$ scp jianqiang.tar.gz [email protected]:/home/wjq/
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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
5c:e0:2d:84:24:53:00:00:65:b0:ea:04:f8:9c:8e:13.
Please contact your system administrator.
Add correct host key in /usr/home/jianqiang/.ssh/known_hosts to get rid of this message.
Offending key in /usr/home/jianqiang/.ssh/known_hosts:1
RSA host key for 10.218.31.97 has changed and you have requested strict checking.
Host key verification failed.
lost connection
在google上找了很久都没有找到原因，跪求高手指点！

[枫叶饭团]

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