当用scp两个服务器相互传输文件时报密钥错误

当用scp两个服务器相互传输文件时报如下错误

scp -P 22 web13701.tar.gz 192.168.188.11:/mnt/
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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
ae:ae:bf:a6:73:ee:f3:96:2a:29:e4:4d:83:1e:f8:0e.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts （这个是重点哦） to get rid of this message.
Offending key in /root/.ssh/known_hosts:2
RSA host key for 192.168.188.11 has changed and you have requested strict checking.
Host key verification failed.
lost connection

分析：
是因为这个服务器之前曾登录过，在/root/.ssh/known_hosts 里边存有一份连接key
如果此时 这个服务器上的密钥更改后，或是重做系统，此时的密钥改变，因此会报告以上连接密钥错误

解决方法：
编辑/root/.ssh/known_hosts 删除连接出错的文件
  然后在重新连接
scp -P 22 web13701.tar.gz 192.168.188.11:/mnt/
The authenticity of host '192.168.188.11 (192.168.188.11)' can't be established.
RSA key fingerprint is ae:ae:bf:a6:73:ee:f3:96:2a:29:e4:4d:83:1e:f8:0e.
Are you sure you want to continue connecting (yes/no)? yes  出现选项了哦
Warning: Permanently added '192.168.188.11' (RSA) to the list of known hosts.
Address 192.168.188.11 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
root@192.168.188.11's password: 输入密码

此时 正确了