REMOTE HOST IDENTIFICATION HAS CHANGED 问题解决-优快云博客

本文介绍了解决SSH连接过程中出现的主机密钥验证失败的问题。通过分析原因，提供了具体步骤来更新客户端的known_hosts文件，确保远程连接的安全性和稳定性。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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
da:f7:3e:ba:f7:00:e6:44:76:f2:58:6e:48:******.
Please contact your system administrator.
Add correct host key in /用户home目录/.ssh/known_hosts to get rid of this message.
Offending RSA key in /用户home目录/.ssh/known_hosts:1
RSA host key for ip地址 has changed and you have requested strict checking.
Host key verification failed.

mac 用ssh 连接时出现的错误，

经过google,出现这个问题的原因是,第一次使用SSH连接时，会生成一个认证，储存在客户端的known_hosts中

可使用以下指令查看：

ssh-keygen -l -f ~/.ssh/known_hosts

出现以下提示：

localhost:~ wenwen$ ssh-keygen -l -f ~/.ssh/known_hosts
256 SHA256:+mnJz4ppatNMHmv1RRoTzaU4nNfDDGSILcaCdmsCO1E 39.106.98.62 (ECDSA)
256 SHA256:Hl/dKTFzL4lOlF8DIG5itaV4OAsZunC2AWlFGLjLfsg 211.159.147.77 (ECDSA)
256 SHA256:mEOLvgTuBDNyawROkrrot3O9y77LIPZDVlRcSC4F2KA 123.207.144.194 (ECDSA)

用以下命令删除：

ssh-keygen -R 服务器端的ip地址

localhost:~ wenwen$ ssh-keygen -R 123.207.144.194
# Host 123.207.144.194 found: line 3
/Users/wenwen/.ssh/known_hosts updated.
Original contents retained as /Users/wenwen/.ssh/known_hosts.old

这样就可以重新连接远程服务器了