当我们使用ssh root@ip登录Linux服务器时,服务器报错:
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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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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:NUY6we/C7Gn1z9Wws0ttHJA7hBhTg8mFoDIh2Z72wGU.
Please contact your system administrator.
Add correct host key in /home/keytech/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/keytech/.ssh/known_hosts:8
remove with:
ssh-keygen -f "/home/keytech/.ssh/known_hosts" -R 112.x2x.xx.xx
ECDSA host key for 112.x2x.xx.xx has changed and you have requested strict checking.
Host key verification failed.
如何解决?原因分析:
这是由于,ssh连接服务器时,如果之前连接过,ssh会默认保存该ip的连接协议信息,当我们再次访问此ip服务器时,ssh会自动匹配之前ssh保存的信息,由于我们的服务器做了更改,例如重装系统等操作,会导致本地保存的ssh信息失效,于是再次连接时就会出现上述错误。
另外,远程服务器的ssh服务被卸载重装或ssh相关数据(协议信息)被删除也会导致这个错误。
解决方案:
删除本地known_hosts里面的缓存信息即可。`命令:ssh-keygen -R "你的远程服务器ip地址" ```
注意:R是大写