https://blog.wongcw.com/2021/01/29/%e7%b5%b1%e4%bf%a1uos-v20%e6%a1%8c%e9%9d%a2%e5%b0%88%e6%a5%ad%e7%89%88%e6%9b%b4%e6%96%b0%ef%bc%9aamd64%e6%9e%b6%e6%a7%8bgrub%e6%bc%a2%e5%8c%96/