重做系统后，SSH无法连接VPS解决办法

今天又买了一个vps，来自口碑很好的linode，想要将博客移过来，另一vps做其他用途，重做了两次系统，再用ssh命令连接时，出现错误如下：

zhang-hengde-MacBook-Air:~ henry24264$ ssh root@66.105.230.188
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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
08:70:a2:d1:8c:a8:e2:a3:75:27:b5:90:ce:54:5b:3d.
Please contact your system administrator.
Add correct host key in /Users/henry/.ssh/known_hosts to get rid of this message.
Offending key in /Users/henry/.ssh/known_hosts:2
RSA host key for 66.105.230.188 has changed and you have requested strict checking.
Host key verification failed.

google之后，找到了解决方案，命令如下，删除相关信息即可，

zhang-hengde-MacBook-Air:~ henry24264$ vi ~/.ssh/known_hosts

之后会看到如下信息：将下面的ssh-rsa全部删除即可，vi命令后，左右键找到下面信息的位置，然后在选中行处，按dd即可删除一行。

192.168.1.2 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAs7tE1nlC8YUMHkJUmSpFeJCc0ztFQiWGIKlyrnf4KVCz+Ece/yY59QXnVG7b0DWA/wyzlaGRdumWFexX4Y7VE3WunEeXVPMRjF0YZgG5qW6EDXNMEquZzI5k7Jg96VGq+5ZzhtsRhUqXH1aNrMYydRfMUFDXTh+a3jKcoQLx9IiifouUuh5JEelql9w9FRgmOgOqmm3CVbn33mblyHZa0UOa3GDpFGRxFjxyPVLuOD90rJIVc126CxIK3TmsFS0emO7qxpz4mrNG/1xpCqgKxNejBkrlUtxzLxGbwuod3HPX7OB28uk1RdGsXhcZtKsPph3a04i7Y5C5QZ1XDXFzDQ==
192.168.1.3 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAsI5fLkoQayuhjMLXaE69VlxA7en/SmxXs+VDjgXLGLLTLdSOxki1cBDzuPm4FefmES4A3X3mfAB8L46rFnPJe45hca4U6uC/IbJMlO8GhrWs+fpIYVdMmOkabBQl8li0J0bclmK