A simple script that helps me to manage my mac addresses.

setMacs.sh

#!/usr/bin/bash
# Inspired by https://wiki.archlinux.org/index.php/MAC_address_spoofing
eth="eth0"
wifi="wlan0"

case $1 in
  old)
    echo "Changing to your old macs:"
    macchanger --mac=xx:xx:xx:xx:xx:xx $eth
    macchanger --mac=xx:xx:xx:xx:xx:xx $wifi
  ;;
  random)
    echo "Changing to random macs:"
    macchanger -r $eth
    macchanger -r $wifi
  ;;
  reset)
    echo "Resetting our original macs:"
    macchanger -p $eth
    macchanger -p $wifi
  ;;
  vendor)
    echo "Changing to random vendor macs:"
    macchanger -e $eth
    macchanger -e $wifi
  ;;
  *)
    echo "Usage $0 [old|random|reset|vendor]"
  ;;
esac