As seen on garron.me

wget -> wget -q -O – checkip.dyndns.org|sed -e ‘s/.*Current IP Address: //’ -e ‘s/<.*$//’

curl -> curl -s checkip.dyndns.org|sed -e ‘s/.*Current IP Address: //’ -e ‘s/<.*$//’

curl -> curl ifconfig.me

lynx -> lynx -dump ifconfig.me | grep ‘IP Address’