Linux 相關
公鑰過於開放問題解決：
Permissions 0644 for '<public-key.pem>' are too open,
It is required that your private key files are not accessible by others.
This private key will be ignored,
load key "<public-key.pem>": bad permisions
Permission denied (publickey)
密鑰文件權限不能爲0644,0644權限太開放了，要求你的密鑰文件不能被其它用戶讀取。
所以我們現在需要修改一下密鑰文件權限。
sudo chown 700 public-key.pem