出现以下的报错信息：
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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
SHA256:6zKiuPSPE90dB6PNCj1fICgA1DTrTxPFiVbl82+sS0E.
Please contact your system administrator.
Add correct host key in /c/Users/xuliugen/.ssh/known_hosts to get rid of this message.
Offending RSA key in /c/Users/xuliugen/.ssh/known_hosts:4
RSA host key for 119.19.19.19 has changed and you have requested strict checking.
Host key verification failed.
解决方式：
1.在客户端执行下述指令
vi ~/.ssh/known_hosts 删除与要访问主机相关的RSA内容
2. ssh-keygen -R 目标主机；提示known_hosts已经更新，再重新ssh远程就可以了。