https://blog.wongcw.com/2018/10/30/mac%e5%85%a7%e5%bb%ba%e3%80%8c%e7%b6%b2%e8%b7%af%e5%b7%a5%e5%85%b7%e7%a8%8b%e5%bc%8f%e3%80%8d%e7%84%a1%e8%ab%96ping%e3%80%81trace%e3%80%81whois%e8%b6%85%e7%b0%a1%e6%98%93/