https://blog.wongcw.com/2020/06/26/canonical%e5%9b%a0%e5%9c%a8ubuntu-motd%e4%b8%ad%e6%a4%8d%e5%85%a5%e5%bb%a3%e5%91%8a%e8%80%8c%e9%81%ad%e5%88%b0%e6%8a%a8%e6%93%8a/