Utility script to get the primary local IP address on your system. Works in Linux and OSX.

getprimaryip.sh

#!/bin/bash

if [ "$(which ipconfig)" != "" ]; then
	for i in $(ifconfig -ul); do
		if [[ $i != lo* ]]; then
			ipaddr=$(ipconfig getifaddr $i)
			if [ "$ipaddr" != "" ]; then
				echo $ipaddr
				exit 0
			fi
		fi
	done
	exit 1
fi

if [ "$(which ip)" != "" ]; then
	for i in $(ifconfig -s | grep -v lo | grep -v Iface | awk '{print $1}'); do
		ipaddr=$(ip -4 -o addr show $i | awk 'BEGIN{FS="[ /]+"}{print $4}')
		if [ "$ipaddr" != "" ]; then
			echo $ipaddr
			exit 0
		fi
	done
	exit 1
fi

exit 2