linux查看公网的ip

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linux系统下怎么查看所在公网的ip

[root@localhost shopex]# curl http://ifconfig.me
**.21*.7.1*0
[root@localhost shopex]# 

查看本机的ip

[root@localhost shopex]# ifconfig 
eth0      Link encap:Ethernet  HWaddr 00:E0:4C:FC:ED:0D  
          inet addr:172.16.1.227  Bcast:172.16.3.255  Mask:255.255.252.0
          inet6 addr: fe80::2e0:4cff:fefc:ed0d/64 Scope:Link