https://blog.wongcw.com/2018/12/23/lubuntu-%e5%be%9e19-04-%e8%b5%b7%e5%b0%87%e5%81%9c%e6%ad%a2%e6%8f%90%e4%be%9b32-%e4%bd%8d%e7%89%88%e6%9c%ac/