今天从一台服务器ssh远程连接另一台服务器时报错，如下:
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:******. 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:34 RSA host key for x.x.x.x has changed and you have requested strict checking. Host key verification failed.
连接失败的原因，报错中说得很清楚，远程主机的key改变了，注释掉本机“/root/.ssh/known_hosts”中第34行的内容即可，重新连接会获取新的key，建立连接。
