自动获取外网ip

$ curl ifconfig.me

$ curl icanhazip.com

$ curl ident.me

$ curl ipecho.net/plain

$ curl whatismyip.akamai.com

$ curl tnx.nl/ip

$ curl myip.dnsomatic.com

$ curl ip.appspot.com

$ curl -s checkip.dyndns.org | sed 's/.*IP Address: \([0-9\.]*\).*/\1/g'

 

转自：http://xmodulo.com/2013/04/how-to-find-the-public-ip-address-from-command-line.html