A function to display and parse local or remote ip address (Mac, Linux & Win (cygwin) supported)

show_ip.sh

# View IP Address
myip() {
	if [ -z "$1" ] || [ "$1" == "--help" ]; then
		echo "Usage: myip OPTION

OPTIONS:
    --remote    displays remote (internet) IP Address
    --local     displays local IP Address(s)
    --help      display this help and exit
";
	elif [ "$1" == "--remote" ]; then
		# dig +short myip.opendns.com @resolver1.opendns.com
	        curl icanhazip.com
	elif [ "$1" == "--local" ]; then
		case "$(uname -s)" in

		  Darwin|Linux)
		    ifconfig eth0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}' 
		    ;;

		  CYGWIN*|MINGW32*|MSYS*)
		    ipconfig | awk '$1 == "IPv4" {print $NF}'
		    ;;

		esac
	else
		echo "Invalid arguments supplied. Use --help for more information"
	fi
}