centos7 查看内网的ip，使用ifconfig 或在后面加上参数，都可以查看内网的ip，下面的10.105.33.17 即是内网的ip
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[root@VM_33_17_centos ~]#ifconfig -a
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.105.33.17 netmask 255.255.192.0 broadcast 10.105.63.255
ether 52:54:00:75:e5:57 txqueuelen 1000 (Ethernet)
RX packets 155966 bytes 15667311 (14.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 44086 bytes 8285980 (7.9 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
loop txqueuelen 0 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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查看外网的ip，使用curl ifconfig.me命令可以查看外网的ip，
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[root@VM_33_17_centos ~]#curl ifconfig.me
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