Add correct host key in C:\\Users\\xxx/.ssh/known_hosts to get rid of this message.

喜欢ヅ旅行 2021-09-21 23:44 220阅读 0赞

### **一、问题描述** ###

云服务器ECS的系统从windows 10（操作系统） 换成CentOS（操作系统）的时候，在本地主机的windows 10 控制台Windows PowerShell用 ssh 连接到远端服务器，即ssh root@121.89.232.xxx时报错如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NTUyNjkx_size_16_color_FFFFFF_t_70][]

关键信息：Add correct host key in C:\\\\Users\\\\xxx/.ssh/known\_hosts to get rid of this message.  
Offending ECDSA key in C:\\\\Users\\\\xxx/.ssh/known\_hosts:2  
ECDSA host key for 121.89.232.xxx has changed and you have requested strict checking.

大概意思就是检查本地认证信息是否发生了变化吧/(ㄒoㄒ)/~~

### **二、原因** ###

因为我第一次用的是windows系统，在安装好OpenSSH ，第一次通过ssh去连接远程的ECS服务器的时候生成了一个认证信息，存储在客户端上，并且这个认证信息是已经经过服务器认证过了的，所以我更换了远程服务器的系统之后，需要更新我们的认证信息，否则会报错。

### **三、解决方法** ###

知道了原因之后容易解决了，通过命令  ssh-keygen -R + 服务器的IP    更新我们的认证信息即可，操作如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NTUyNjkx_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NTUyNjkx_size_16_color_FFFFFF_t_70]: /images/20210920/2638c1ed7fa941239095b657998fa111.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI2NTUyNjkx_size_16_color_FFFFFF_t_70 1]: /images/20210920/c600d79283f8463da4ec8868b5f0132a.png

Add correct host key in C:\\Users\\xxx/.ssh/known_hosts to get rid of this message.

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