GitHub Err (3)git push -u origin main报错

0. 报错


$ git push -u origin main
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 RSA key sent by the remote host is
SHA256:uNiVztksCsDhcc0u9e8BujQXVUpKZIDTMczCvj3tD2s.
Please contact your system administrator.
Add correct host key in /c/Users/dell/.ssh/known_hosts to get rid of this message.
Offending RSA key in /c/Users/dell/.ssh/known_hosts:2
Host key for github.com has changed and you have requested strict checking.
Host key verification failed.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

1. 分析

看这两行，原因是系统有改变，导致加密的密钥改变,因此本地保存的密钥失效


Add correct host key in /c/Users/dell/.ssh/known_hosts to get rid of this message.
Offending RSA key in /c/Users/dell/.ssh/known_hosts:2

2. 解决

删除c/Users/dell/.ssh/known_hosts:2 文件中指定ip的密钥即可，

我这里提示的是删除第二行

2.1 生成密钥

在打开的窗口输入，设置user.name和user.email配置信息


git config --global user.name "你的GitHub用户名"
git config --global user.email "你的GitHub注册邮箱"


git config --global user.name "genghenggao"
git config --global user.email "genghenggao@outlook.com"

然后生成ssh密钥文件


ssh-keygen -t rsa -C "你的GitHub注册邮箱"


ssh-keygen -t rsa -C "genghenggao@outlook.com"

然后三个回车就可以了

然后在C:\Users\admin\.ssh文件夹中找到id_rsa.pub,将里面所有的内容全部复制出来。

在这个网址https://github.com/settings/keys ，点New SSH key


ssh-rsa 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 genghenggao@outlook.com