Derive Public IP address of a host from command line:
dig +short myip.opendns.com @resolver1.opendns.com
curl bot.whatismyaddress.com -w β\nβ
curl ip.tyk.nu -w β\nβ
curl wgetip.com -w β\nβ
curl whatismyip.akamai.com -w β\nβ
curl ipecho.net/plain -w β\nβ
curl ident.me -w β\nβ
curl -s http://ifconfig.me -w β\nβ
cat icanhazip.com 80 <<< $βGET / HTTP/1.1\nHost: icanhazip.com\n\nβ | tail -n1
zenity βinfo βtext β$(curl -s icanhazip.com)β