一、现状
本地有一个新仓库并有代码；github上新建一个仓库；
二、诉求
想把本地仓库的代码推送到远程新仓库内；
三、问题现状和解决办法
问题1：host key in xx to get rid of this message
# 关联远程分支
git remote add origin git@github.com:xxx/xxx.git
# 推送远程分支
git pull origin master
报错：
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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 /Users/xxx/.ssh/known_hosts to get rid of this message.
Offending RSA key in /Users/xxx/.ssh/known_hosts:4
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.
看错误提示，说host key不正确；因此需要生成正确的key并重新配置。
# 依次执行命令 更新key
ssh-keygen -R github.com
curl -L https://api.github.com/meta | jq -r '.ssh_keys | .[]' | sed -e 's/^/github.com /' >> ~/.ssh/known_hosts
把id_rsa.pub文件内的key添加到github账户内的sshkey内。
# 查看新的key 复制并黏贴至github账户的sshkey内
cat /Users/xxx/.ssh/id_rsa.pub
再通过命令验证本地与远程是否可以通信：
ssh -T git@github.com
# 出现以下信息表明链接成功：
Hi xxx! You've successfully authenticated, but GitHub does not provide shell access.
再推送至远程分支：
git branch -M master
git push -u origin master
四、参考资料
https://github.blog/news-insights/company-news/we-updated-our-rsa-ssh-host-key/
https://stackoverflow.com/questions/2643502/git-how-to-solve-permission-denied-publickey-error-when-using-git