Suppress internal WLAN interface on startup in Kali

Question

If I need to suppress my WLAN interface from probing and being probed whenever I start up Kali, what is the right way to keep wlan0 down on startup.

I tried inserting a bash script below to the file /etc/crontab, but it is not working (wlan0 is still on automatically on startup and even connect to a Wifi).

#! /bin/sh

service NetworkManager stop
airmon-ng check kill

Answer 1

Do this with init.d and rc.d

1. sudo nano ~/etc/init.d/wlan0-down

2. put this in it

   #!/bin/bash
   ifconfig wlan0 down
   exit 0
   

3. sudo chmod +x /etc/init.d/wlan0-down

4. sudo update-rc.d wlan0-down defaults

That should shutdown wlan0 (or whatever you replace that with) at startup.