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当我们尝试通过SSH#xff08;Secure Shell#xff09;连接到远程服务器时#xff0c;有时会遇到一个警告信息#xff1a;“WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!”。这个消息表明SSH客户端检测到远程主机的身份#xff08;即其SSH密钥#xff09…问题背景
当我们尝试通过SSHSecure Shell连接到远程服务器时有时会遇到一个警告信息“WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!”。这个消息表明SSH客户端检测到远程主机的身份即其SSH密钥与之前记录在 known_hosts 文件中的信息不符。
具体的报错如下部分信息已做脱敏处理 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:pcb66b5/nvAdJqpH6HWb9SvFrCH82qqL3XQNxGL3Uw.
Please contact your system administrator.
Add correct host key in ~/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in ~/.ssh/known_hosts:26
ECDSA host key for [111.222.113.114]:36000 has changed and you have requested strict checking.
Host key verification failed.这种情况通常发生于以下几种场景之一
服务器更换了SSH密钥 这可能是因为服务器的操作系统被重新安装或SSH服务的密钥被重新生成。网络安全问题 可能存在中间人攻击有人试图拦截或篡改您的SSH连接。本地known_hosts文件错误 如果之前连接过同一个IP地址的不同服务器或者手动编辑过该文件也可能导致这个问题。
解决方案
从 known_hosts 文件中删除有关该服务器的旧密钥
ssh-keygen -f ~/.ssh/known_hosts -R 111.222.113.114或者更暴力一点直接
rm ~/.ssh/known_hosts
