Mac ssh 不成功

在mac上连公司的linux报错

ssh yuben@120.236.142.xxx

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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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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
ea:24:31:8d:03:07:36:db:2f:74:15:5d:58:67:a3:5b.
Please contact your system administrator.
Add correct host key in /var/root/.ssh/known_hosts to get rid of this message.
Offending key in /var/root/.ssh/known_hosts:1
RSA host key for 120.236.142.xxx has changed and you have requested strict checking.
Host key verification failed.

原来ssh过一次的主机都会保存对应IP的密钥，刚好重装过。

清理旧的密钥：

ssh-keygen -R 120.236.142.xxx