ssh连接远程服务器出现Host key verification failed. lost connection问题的解决

本是古典何须时尚 2022-05-06 13:52 434阅读 0赞

## 1.问题如下: ##

>     @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
>     @    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:UggbFShWZWxVBwyKHyYcCIkTNsl+r9Awg8Mv0E7mq5c.
>     Please contact your system administrator.
>     Add correct host key in /home/python/.ssh/known_hosts to get rid of this message.
>     Offending ECDSA key in /home/python/.ssh/known_hosts:1
>       remove with:
>       ssh-keygen -f "/home/python/.ssh/known_hosts" -R 39.108.71.7
>     ECDSA host key for 39.108.71.7 has changed and you have requested strict checking.
>     Host key verification failed.
>     lost connection

## 2.原因分析 ##

>     在主机子系统每次成功ssh连接远程操作，都会把你每个你访问过计算机的公钥(public key)都记录在主机的目录/Users/icarus/.ssh/known_hosts下，当下次访问相同子机服务器时，会核对公钥。如果公钥不同，会发出警告，避免你受到DNS Hijack之类的攻击。

## 3.解决方法  ##

>     进入目录删除文件即可，然后重新连接就能发现连接上了。
>     
>     cd  ~/.ssh/
>     rm  known_hosts
> 
> 即可完美解决!

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