https://www.i-garden.org/blog/2019/04/29/%e5%84%aa%e7%a7%80ict%e6%95%99%e5%ad%b8%e8%a8%98%e9%8c%84%e7%89%87-linux%e4%b9%8b%e7%88%b6%e7%9a%84%e7%ac%ac%e4%b8%80%e5%80%8b%e7%a8%8b%e5%bc%8f-my-first-line-of-code-linus-torvalds/