https://blog.wongcw.com/2018/11/20/hosts-file-editor-v1-5-8-%e5%a4%9a%e8%af%ad%e8%a8%80%e4%b8%ad%e6%96%87%e6%ad%a3%e5%bc%8f%e7%89%88-hosts%e6%96%87%e4%bb%b6%e7%bc%96%e8%be%91%e5%99%a8/