Secure Shell is a cryptographic network protocol for operating network services securely over an unsecured network.Typical applications include remote command-line login and remote command execution,but any network service can be secured with SSH.

1. 设置Git用user name和email

   git config --global user.name "XXX"
   git config --global user.email "XXX@gmail.com"

2. 生成密钥

   ssh-keygen -t rsa -C "XXX@gmail.com"

   中间连续3次Enter键.

3. 测试SSH key是否设置成功

   ssh -T git@github.com

   出现下面提示直接输入yes.

   The authenticity of host 'github.com (192.30.253.113)' can't be established.
   RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
   Are you sure you want to continue connecting (yes/no)? yes

   输出如下，则表示通过.

   Hi xxxx! You've successfully authenticated, but GitHub does not provide shell access.

   使用时，会根据本地git密钥信息与git或者coding仓库密钥信息比对，本地上传时会提示登录。