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資訊記錄，這裡選擇後一種。

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

4，先備份系統檔案，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-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA0ifRyEQAdoH+1GFnFv+c+vzQ8tCIxREuAff57heXPt0sJpTNaJaB/RsFV4yKmBdyrOggdmxEdm1G851Ni+m6OW7fzUdZnqfQaF/pAmu0fyhVGWa0rjNG6IVyrrFEMKxn8cgLSLfxSwfC8aM6y30sCBAeUy6xTUI2ImOMk9e9UR6vBSENweZUj53CqfIg/NfqL1GozShiKF4+Wt3zuQDVTMNbPeB3Yyp3U+v4TLnAaYgA5fjGGZmN0QUcI//toZpyVVWmFnxXUKhqFzmHDPNrlfgq2nCqXCdYUVCZHty7hupDY0YkzUt12VR5Ifdg2BpvHZki5cPZL/046laeIX1DGw==
刪除即可。

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 ~]#

SCP報錯：Host key verification failed.

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