#### 1.生成公钥
```
ssh-keygen -t rsa -b 4096 -C "your_email@example.com" -f ~/.ssh/github_id_rsa
```
#### 2.配置
在`config`文件添加配置(没有config文件则新建):
```
# github
Host github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/github_id_rsa
```
### 3.添加公钥
复制`~/.ssh/github_id_rsa.pub`内容在`github`上添加公钥
### 3.测试公钥
```
ssh -T git@github.com
```