‘命令行, curl 查询公网 ip’
curl ifconfig.me
curl whatismyip.akamai.com
curl https://ip.cn
curl icanhazip.com
curl ident.me
curl tnx.nl/ip
curl myip.dnsomatic.com
https://blog.csdn.net/liu0808/article/details/80769810
curl http://members.3322.org/dyndns/getip
# 保存到文件
wget http://ifconfig.me/ip
wget http://members.3322.org/dyndns/getip
http://blog.csdn.net/teddy17/article/details/12618035
curl http://myip.ipip.net/
curl cip.cc
curl ifconfig.me
curl myip.ipip.net
curl http://members.3322.org/dyndns/getip