#國內某網站的接口，只返回IPcurl ip.6655.com/ip.aspxcurl whatismyip.akamai.com#更多用法訪問ifconfig.cowget -qO - ifconfig.co curl icanhazip.comdig +short myip.opendns.com @resolver1.opendns.com curl ident.mecurl v4.ident.mecurl v6.ident.me#慢curl curlmyip.com curl ifconfig.mecurl inet-ip.info  #返回IP和地區curl ip.6655.com/ip.aspx?area=1curl 1111.ip138.com/ic.aspcurl ip.cncurl cip.cc  #需要翻x墻，只返回IPcurl ip.appspot.com #參考 http://unix.stackexchange.com/questions/22615/how-can-i-get-my-external-ip-address-in-bash#有人給了以下測試方法 wget https://raw.githubusercontent.com/rsp/scripts/master/externalip-benchmarkchmod a+x externalip-benchmark./externalip-benchmark