, create root user: , sudo passwd root , , add , deb http://httpredir.debian.org/debian/ stretch main contrib non-free , to /etc/apt/sources.list.d/base.list , , install the software needed: , apt-get update && apt-get install firmware-iwlwifi , , change to root: , su - , , activate device: , modprobe -r iwlwifi ; modprobe iwlwifi , ,