Permissions 0644 for '/Users/Ryul/Downloads/ryul_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 "/Users/Ryul/Downloads/ryul_key.pem": bad permissions
ubuntu@15.164.251.67: Permission denied (publickey).
이렇게 뜨면서 연결이 안되는데 어떻게 해야 연결이 될까요? 키체인을 다시 받아야하나요?