How to install aircrack to capture mac address on dd-wrt

Hi,

I am trying to capture the mac addresses of devices (mostly cell phones) in the vincinity of my router. I have a Asus RT-AC68u that has been flashed with a recent build of DD-WRT ( "DD-WRT v24-sp2 (04/02/14) kongac" to be precise).

I managed to get...