https://blog.wongcw.com/2020/05/28/linux%e4%bd%9c%e8%80%85%e5%88%86%e4%ba%ablinus-torvald%e6%9c%80%e6%96%b0%e9%96%8b%e7%99%bc%e6%a9%9f%e7%b4%b0%e7%af%80/