TL;DR: Dear Kali user, when you have a moment, check your /etc/apt/sources.list, and add non-free-firmware if ever it’s missing. Programmatically speaking: kali@kali:~$ sudo sed -i 's/non-free$/non-free non-free-firmware/' /etc/apt/sources.list --- Long story now. As you might know already, Kali Linux is a Debian-based Linux distribution. As such, it inherits a number of things from Debian, and in particular, the structure of the package repository. For anyone familiar with Kali, you alread...