scp传送文件报错 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED

denglj

系统：rhel 6.5

问题描述：使用scp传送文件时，出现告警“WARNING:REMOTE HOST IDENTIFICATION HAS CHANGED!”，如下所示：

[root@localhost rmanbak]# scpctl_i1158ubk_1_1.bak root@192.168.133.208:/tmp

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@   WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

IT IS POSSIBLE THAT SOMEONE IS DOINGSOMETHING NASTY!

Someone could be eavesdropping on youright now (man-in-the-middle attack)!

It is also possible that the RSA host keyhas just been changed.

The fingerprint for the RSA key sent bythe remote host is

ea:ab:7c:4e:d0:61:6b:f6:cb:80:b7:32:79:d1:e6:e8.

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:2

RSA host key for 192.168.133.208 haschanged and you have requested strict checking.

Host key verification failed.

lost connection

异常原因：

因为主机名为localhost的已经给IP为192.168.133.208生成过公匙.然而IP为192.168.133.208的主机系统因某种原因被重建过，重建时使用了相同IP地址，那么当scp或者ssh相同IP的新主机时就会出现以上告警.

解决方案：

清除旧公匙信息.

[root@localhost rmanbak]# ssh-keygen-R192.168.133.208

清除后，scp正常传送文件.