Step-by-step – Debian Bullseye Realtek RTL8821cu Driver Installation

GNU/Linux Debian Bullseye Realtek RTL8821cu Driver Setup – Step-by-step Guide

Hi! The Tutorial shows you Step-by-Step How to Install Realtek RTL8821cu Wireless Driver in Debian Bullseye 11.x GNU/Linux.

Especially relevant: this Realtek RTL8821cu Driver Debian 11 Setup should be working also after a Kernel Upgrade with the Dkms integration.

Please be aware of how this Driver is Not supporting all the Linux Kernels range, so in case of issue consult the available Online Documentation.

So as a possible Solution, then you may also see: How to Install New Kernel Guide.

Again, in case of Issue for preventing any possible Driver loading Interference you should also take into account: How to Blacklist Kernel Modules.

1. 1. Launching Terminal

   Open a Terminal Shell Emulator Window:
   (Press “Enter” to Execute Commands).

   
   In case first see: Terminal QuickStart Guide.
   

2. 2. Installing Dependencies

   Then to Install Required Stuff Simply play:

   sudo apt install linux-headers-generic build-essential git dkms unzip

3. 3. Downloading Realtek RTL8821cu Driver

   Download Realtek Driver in Debian GNU/Linux

   Get Realtek Wi-fi Driver in Debian

   Driver Realtek RTL8821cu Source for Debian
   If you are using Firefox then on Prompt Choose “Open with Archive Manager”:
   
   Or After try to Select the Package by the Downloads Button on Top Panel:
   
   Instead, on Google-Chrome simply try to Choose the Package on the Bottom Panel:
   
   How to Install Chrome Browser on Debian