$ ssh -T -v git@github.com報錯：
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/eveline/.ssh/id_rsa
debug1: Trying private key: /Users/eveline/.ssh/id_dsa
debug1: Trying private key: /Users/eveline/.ssh/id_ecdsa
debug1: Trying private key: /Users/eveline/.ssh/id_ed25519
debug1: No more authentication methods to try.
git@github.com: Permission denied (publickey).
Troubleshooting（macOS系統）
看了很多博客和官方文檔，我的解決方法如下：
先查看一下配置信息
$ ssh-add -l
The agent has no identities.
如果是這樣，就是沒有添加成功私人密鑰，雖然已經生成了並且上傳到了GitHub的ssh
$ ssh-add ~/.ssh/id_rsa #這個id_rsa應是你命名的私人密鑰默認名，這里顯示為沒有此文件。我在生成時命名為了Jack_key
/Users/eveline/.ssh/id_rsa: No such file or directory
搞清楚了，開始行動
找到你生成的密鑰文件路徑，執行下面命令：
$ ssh-add path/to/your/ssh-key
Identity added: /Users/eveline/.ssh/Jack_key (/Users/eveline/.ssh/Jack_key)
好了，查看一下
$ ssh-add -l
2048 SHA256:Dd02IHmxxxxx...xxxxxxxxxFPsHkGxiVh48m0qI /Users/eveline/.ssh/Jack_key (RSA)
如此，則配置成功！
永久性添加密鑰方法（僅Mac用戶）：
$ ssh-add -K path/to/your/ssh-key
該方法摘自https://segmentfault.com/q/1010000000835302，更多信息請參考該文，win用戶請參考該文
大功告成
$ ssh -T -v git@github.com即可