ssh 的 機制

當 ssh 連不出去 而且會出現下面的訊息的時候

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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
c0:87:39:48:e8:d3:d5:2d:86:62:ba:8c:9f:64:22:03.
Please contact your system administrator.
Add correct host key in /home/raid5/Andy/.ssh/known_hosts to get rid of this message.
Offending key in /home/raid5/Andy/.ssh/known_hosts:2
RSA host key for 140.AAA.BBB.CCC has changed and you have requested strict checking.
Host key verification failed.

表示 對方的  一些資訊已經被改掉了  而本地的  資訊卻沒有跟著改變 

所以 只要把 本地的 資料記錄處也給  砍掉就可以了  

方法如下  

要把rm  ~./ssh/know_host 的相關資料給砍掉  這樣就可以連過去了