問題現象：
github上創建了一個遠程倉庫，將我的代碼推送到遠程倉庫git push -u origin master時，出現下面報錯
The authenticity of host 'github.com (52.74.223.119)' can't be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'github.com,52.74.223.119' (RSA) to the list of known hosts.
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.
問題原因：Github與ssh連接需要密鑰
解決方法：
1.本地mac 公鑰路徑取密鑰：cd ~/.ssh （id_rsa.pub）
2. 登錄自己的github進入項目的存儲庫----進入setting----部署秘鑰（Deploy keys）
3.配置ssh key的時候勾選下面的Allow write access，在settings的deploy key欄目才有讀寫權限
4.配置完成之后再去項目中操作git即可
解決結果：
git push -u origin master
Enumerating objects: 3, done.
Counting objects: 100% (3/3), done.
Writing objects: 100% (3/3), 218 bytes | 109.00 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0)
To git+ssh://github.com/illusion1010/Hog.git
* [new branch] master -> master
Branch 'master' set up to track remote branch 'master' from 'origin'.