github -- 配置ssh

1. [查找本地已经配置的秘钥]
ls -al ~/.ssh  

2. [生成秘钥对，期间一直摁回车即可]
ssh-keygen -t rsa -b 4096 -C "自己的邮箱" 

3. [查看刚才生成的秘钥，会出现id_rsa和id_rsa.pub]
ls ~/.ssh/ 

4. [查看公钥内容，复制它粘贴到github-settings-SSH-new ssh key处]
cat ~/.ssh/id_rsa.pub 

5. [测试ssh是否配置成功，若看见You've successfully authenticated即成功配置]
ssh -T git@github.com