git@github.com: Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

已经使用git config设置邮箱和密码，可以说使用git config --list查看，用ssh-keygen生成密钥x_github_idrsa，并将x_github_idrsa.pub内容复制进github

Generating public/private rsa key pair.

Enter file in which to save the key (/home/x/.ssh/id_rsa): x_github_idrsa

使用ssh_add报错

ssh-add ~/.ssh/x_github_idrsa

Could not open a connection to your authentication agent.

正确案例：Identity added:xxxxxx

正确处理方法

https://stackoverflow.com/questions/17846529/could-not-open-a-connection-to-your-authentication-agent

先打开ssh_add，再添加密钥就可以使用git push了

eval `ssh-agent -s`

ssh-add

ssh-add ~/.ssh/x_github_idrsa

参考文章Git使用出现git@github.com: Permission denied (publickey). 处理https://blog.csdn.net/qq_43768946/article/details/90411154 用一下git push能出这么多问题是没想到的，stackoverflow还是好用 https://stackoverflow.com/questions/13509293/git-fatal-could-not-read-from-remote-repository 实在不行删除.ssh文件夹里的known_hosts，每次连接应该会重新生成，要不删除ssh_key再重新生成复制进github

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