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解决:WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING
2022-08-04 10:07:00 【timerring】
目录
一、问题出现
在采用ssh连接远程服务器时,报错如下:
C:\Users\24163>ssh [email protected]_IP
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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:NXXXXXXXXXXXXXXXXXXXXXXXXXXXL2YY.
Please contact your system administrator.
Add correct host key in C:\\Users\\24163/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in C:\\Users\\24163/.ssh/known_hosts:4
ECDSA host key for YOUR_IP has changed and you have requested strict checking.
Host key verification failed.
二、原因分析
根据报错信息,可以分析得知,
“It is also possible that a host key has just been changed.”以及“ECDSA host key for YOUR_IP has changed and you have requested strict checking.Host key verification failed.”
显示主机密钥已更改,因此验证失败。
ssh是以公钥和私钥进行认证的,因此它会将计算机/服务器之间进行访问的公钥记录到~/.ssh/known_hosts中,当下一次访问时,ssh会核对公钥,若认证失败,则OpenSSH会发出警告!
而这一现象常常出现在服务器重装系统之后,这时连接与上一系统的连接不同,因此会认证不通过。
三、解决方案
解决这一问题的方法很简单,只需要进入用户文件夹下的.ssh文件夹中,删除红框内的文件即可。

注意:.ssh是隐藏文件夹,如果找不到该文件夹,可能电脑未勾选显示“隐藏的项目”。
如下图 查看--->显示--->隐藏的项目,即可。

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