使用ssh登陆其他服务器时，遇到如下报错：
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.
Please contact your system administrator.
Add correct host key in /home/user01/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/user01/.ssh/known_hosts:11
Password authentication is disabled to avoid man-in-the-middle attacks.
Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
Agent forwarding is disabled to avoid man-in-the-middle attacks.
X11 forwarding is disabled to avoid man-in-the-middle attacks.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
这个警告信息是由于SSH客户端检测到目标主机的身份验证信息发生了变化。这可能是由于目标主机的SSH密钥已更改。
解决这个问题需要找到并编辑 家目录下的~/.ssh/known_hosts 文件，在文件中找到包含目标主机信息的行，删除或注释掉该行。在这个例子中，目标主机信息在第11行。保存更改并关闭编辑器，尝试重新连接到目标主机，问题解决。
