Host key verification failed.

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
05:25:84:ea:dd:92:8d:80:ce:ad:5b:79:58:fe:c9:42.
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:10
RSA host key for 192.168.1.90 has changed and you have requested strict checking.
Host key verification failed.

处理办法：

因为之前known_hosts记录了该主机连接信息，由于目标端算法变了，所以需要删掉客户端记录的信息，重新连接即可。

vi ~/.ssh/known_hosts

删除对应ip的相关rsa信息

重新连接即可：