用Linux命令行获取本机外网IP地址
$ curl ifconfig.me
[root@localhost ~]# curl ifconfig.me
14.23.92.186
$ curl icanhazip.com
[root@localhost ~]# curl icanhazip.com
14.23.92.186
$ curl ident.me
[root@localhost ~]# curl ident.me
14.23.92.186
$ curl ipecho.net/plain
[root@localhost ~]# curl ipecho.net/plain
14.23.92.186
$ curl whatismyip.akamai.com
[root@localhost ~]# curl whatismyip.akamai.com
14.23.92.186
$ curl tnx.nl/ip
[root@localhost ~]# curl tnx.nl/ip
14.23.92.186
$ curl myip.dnsomatic.com
[root@localhost ~]# curl myip.dnsomatic.com
14.23.92.186
$ curl ip.appspot.com
[root@localhost ~]# curl ip.appspot.com
curl: (7) couldn‘t connect to host
$ curl -s checkip.dyndns.org | sed ‘s/.*IP Address: \([0-9\.]*\).*/\1/g‘
[root@localhost ~]# curl -s checkip.dyndns.org | sed ‘s/.*IP Address: \([0-9\.]*\).*/\1/g‘
14.23.92.186
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原文：http://2892931976.blog.51cto.com/5396534/1738617