1. ssh问题
上海lock down74天之后，我从自己家回到父母家，再次使用git命令行遇到报错：
Please make sure you have the correct access rights and the repository exists
在stackoverflow找到答案，在此贴一下：
This issue can be caused because sometimes ssh-agent is not persistent across reboots. You should check if ssh-agent has your key added:
ssh-add -l -E md5
if you get the output like:
The agent has no identities.
it means ssh-agent has lost your key. In that case, you simply need to add the identity key again. Something like:
ssh-add ~/.ssh/git_rsa
The error should disappear now!
总结：只要不重新生成，ssh-key是不变的，但移动电脑可能导致ssh-agent会丢失ssh-key，此时需要手动添加一下。
2. 丢失git config问题
遇到用户权限问题，只要运行git config --list检查user.name和user.email是否丢失，就能找到问题。这次我就遇到了name还在，但email丢失的情况，手动添加email就可以了。
3.# 常见错误 之 error: src refspec xxx does not match any / error: failed to push some refs to
解决方案： 把本地的 master 仓库名称修改为远端的 main
git branch -m oldBranchName newBranchName
然后，push 就好了.
