The authenticity of host 'github.com (13.229.188.59)' can't be established.

昨天重装了系统今天git push的时候发现了这个问题，原因是本地仓库和远程的SSH不匹配

解决办法：

1.出现Are you sure you want to continue connecting (yes/no)?时，选择yes

2. ls -al ~/.ssh

3. ssh-keygen -t rsa -C "github用户名"，按三次回车

4.cat ~/.ssh/id_rsa.pub生成新的SSH

5.登陆github,点击头像-settings-new SSH,复制新生成的SSH

6.正常push