SCP報錯：Host key verification failed

1 scp報錯：REMOTE HOST IDENTIFICATION HAS CHANGED!

[root@xx ~]# scp yum-3.4.3.tar.gz 10.xx.xx.12:/root
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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
xxxxx.
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:20
RSA host key for 10.xx.xx.12 has changed and you have requested strict checking.
Host key verification failed.
lost connection
[root@cache-2 ~]#

2， google，RSA報錯，要不重建RSA Key，要麼就刪除Client的known_hosts中對應的ip信息記錄，這裏選擇後一種。

3， 先找到known_hosts的路徑
[root@xx tmp]# find / -name known_hosts
/root/.ssh/known_hosts

4，先備份系統文件，在修改
[root@cache-2 tmp]# 
[root@cache-2 tmp]# 
[root@cache-2 tmp]# cp /root/.ssh/known_hosts /root/.ssh/bak.20140526.known_hosts
[root@cache-2 tmp]# 
[root@cache-2 tmp]# vim /root/.ssh/known_hosts
找到
10.xx.xx.12 ssh-rsaAAAAB3NzaC1yc2EAAAABIwAAAQEA0ifRyEQAdoH+1GFnFv+c+vzQ8tCIxREuAff57heXPt0sJpTNaJaB/RsFV4yKmBdyrOggdmxEdm1G851Ni+m

6OW7fzUdZnqfQaF/pAmu0fyhVGWa0rjNG6IVyrrFEMKxn8cgLSLfxSwfC8aM6y30sCBAeUy6xTUI2ImOMk9e9UR6vBSENweZUj53CqfIg/NfqL1GozSh

iKF4+Wt3zuQDVTMNbPeB3Yyp3U+v4TLnAaYgA5fjGGZmN0QUcI//toZpyVVWmFnxXUKhqFzmHDPNrlfgq2nCqXCdYUVCZHty7hupDY0YkzUt12VR5

Ifdg2BpvHZki5cPZL/046laeIX1DGw==
刪除便可。

5，再執行scp命令，輸入密碼，傳輸成功。
[root@xx ~]# scp yum-3.4.3.tar.gz 10.xx.xx.12:/root
root@10.xx.1x.12's password: 
yum-3.4.3.tar.gz                                                                                                                                             100% 1114KB   1.1MB/s   00:00    
[root@xx ~]#