a small .bash_profile snippet to force renew a new local ip from a DHCP server

.bash_profile

random-mac()
{
  node -e "var v = [1,2,3,4,5,6,7,8,9,0,'a','b','c','d','e','f']; var r = function(){ return v[Math.floor(Math.random() * v.length)] }; console.log( '00:' + r() + r() + ':' + r() + r() + ':' + r() + r() + ':' + r() + r() + ':' + r() + r())"
}

new-ip()
{
  sudo ifconfig en0 ether `random-mac`
  sudo ipconfig set en0 BOOTP
  sudo ipconfig set en0 DHCP
}