use this:
curl icanhazip.com
or this:
function myip(){
myip="$(ifconfig | grep 'inet.*netmask.*broadcast')"
lanip="$(echo $myip | awk '{print $2}')"
publicip="$(echo $myip | awk '{print $6}')"
echo '你的局域网IP是: '$lanip
echo '你的外网IP是: '$publicip
echo '复制到剪贴板' $lanip | pbcopy
}