Get current IP addresses

get_ip.sh

#!/bin/sh

IP=""
OS=`uname`

case "${OS}" in
  Linux)
    IP=`ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}'`
    ;;
  FreeBSD|OpenBSD)
    IP=`ifconfig | grep -E 'inet.[0-9]' | grep -v '127.0.0.1' | awk '{ print $2}'`
    ;;
  SunOS)
    IP=`ifconfig -a | grep inet | grep -v '127.0.0.1' | awk '{ print $2} '`
    ;;
  Darwin)
    IP=`ifconfig | grep inet | grep -v '127.0.0.1' | awk '{ print $2 }'`
    ;;
  *)
    IP="Unknown"
    ;;
esac

echo "$IP"