通过ssh 来连接远程主机时，无法连接成功，报错信息如下：

[root@localhost ~]# ssh 192.168.10.88

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@ 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 RSA key sent by the remote host is

SHA256:n68rgNbkHuLve0/7STYDiD+oE/g1egasGi2uigu4diU.

Please contact your system administrator.

Add correct host key in /root/.ssh/known_hosts to get rid of this message.

Offending RSA key in /root/.ssh/known_hosts:11

RSA host key for 192.168.10.88 has changed and you have requested strict checking.

Host key verification failed.

解决办法：

ssh会把访问过计算机的公钥(public key)都记录在/root/.ssh/known_hosts。当下次在访问这个远程主机时，OpenSSH会核对公钥。如果公钥不同，OpenSSH会发出警告，避免你受到DNS Hijack之类的。既然找到原因了，那就好解决了，直接编辑，