https://blog.wongcw.com/2018/12/24/canonical%e7%99%bc%e4%bd%88%e5%85%a7%e6%a0%b8%e5%ae%89%e5%85%a8%e6%9b%b4%e6%96%b0%e6%89%80%e6%9c%89%e6%94%af%e6%8c%81ubuntu%e7%89%88%e6%9c%ac%e6%87%89%e7%9b%a1%e5%bf%ab%e5%8d%87%e7%b4%9a/