ssh远程连接服务器时，报错如下：

[root@izwz94b8tt3jlf3ne0ymp3z ~]# ssh 192.168.220.8
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 is
SHA256:b4n9tK3W8HptgQzGPwjWRbPpcv3FkdyA3dLgzgdV78U.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:1019
Password authentication is disabled to avoid man-in-the-middle attacks.
Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).

解决办法：

ssh-keygen -R 服务器地址

[root@izwz94b8tt3jlf3ne0ymp3z ~]# ssh-keygen -R 192.168.220.8
# Host 192.168.220.8 found: line 1019
/root/.ssh/known_hosts updated.
Original contents retained as /root/.ssh/known_hosts.old
[root@izwz94b8tt3jlf3ne0ymp3z ~]# ssh 192.168.220.8
Warning: Permanently added 192.168.220.8 (ECDSA) to the list of known hosts.
root@192.168.220.8s password: 

[root@izwz94b8tt3jlf3ne0ymp3z ~]# ssh 192.168.220.8
root@192.168.220.8s password: 

[root@izwz94b8tt3jlf3ne0ymp3z ~]#

然后重新链接