解决git@github.com: Permission denied (publickey). Could not read from remote repository.

https://www.jianshu.com/p/7d57ce4147d3  

执行ssh-add时出现Could not open a connection to your authentication agent

若执行ssh-add /path/to/xxx.pem是出现这个错误:Could not open a connection to your authentication agent，则先执行如下命令即可：

ssh-agent bash

作者：小晨主
链接：https://www.jianshu.com/p/1dc426760e1d
来源：简书
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