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1. ssh远程登录警告提示信息如下：

$ ssh th@192.168.162.136@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@    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 a host key has just been changed.The fingerprint for the ECDSA key sent by the remote host isSHA256:Hz9lI5FK/x7MZ758HExCNqGML5PeDUkpxTSuCHVvZ74.Please contact your system administrator.Add correct host key in /Users/xubinbin/.ssh/known_hosts to get rid of this message.Offending ECDSA key in /Users/xubinbin/.ssh/known_hosts:9ECDSA host key for 192.168.162.136 has changed and you have requested strict checking.Host key verification failed.

2. 问题原因：

It is also possible that a host key has just been changed.

3. 解决方式1：

通过 ssh-keygen 密钥工具更新

$ ssh-keygen -f ~/.ssh/known_hosts -R 192.168.162.136# Host 192.168.162.136 found: line 9/Users/xubinbin/.ssh/known_hosts updated.Original contents retained as /Users/xubinbin/.ssh/known_hosts.old

4. 解决方式2：

以编辑器的方式进入这个文件，手动清楚ssh公钥信息

vi ~/.ssh/known_hosts

删除之前获取的ssh公钥信息（删除下面红框内信息），重新连接，建立新的连接，或取新的公钥；

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