Step-by-step – Realtek Rtl8821AU Debian Bullseye Driver Installation

GNU/Linux Debian Bullseye Realtek rtl8821AU Driver Setup – Step-by-step Guide

Hi! The Tutorial shows you Step-by-Step How to Install Realtek rtl8821AU WiFi Driver in Debian Bullseye 11.x GNU/Linux.

Especially relevant: this Realtek rtl8821AU Driver Debian Bullseye Setup should be working also after a Kernel Upgrade with the Dkms integration.

Finally, from the Realtek Support Driver Website comes out that it may be working for all the following Chipsets:

• RTL8192EU
• RTL8811AU
• RTL8811CU
• RTL8812AU
• RTL8812BU
• RTL8814AU
• RTL8821AU

1. 1. Launching Shell Emulator

   Open a Terminal window
   (Press “Enter” to Execute Commands).

   
   Refresh the Apt Sources:

   sudo apt update

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

2. 2. Downloading Realtek rtl8821AU Driver

   (Bewilderment can arise because this setup is making use of the rtl8812AU Code)
   Download Realtek rtl8821AU Driver in Debian GNU/Linux

   Get Realtek rtl8821AU Driver in Debian

   Realtek rtl8821AU Driver Source Realtek for Debian

   Or better Clone it with Git.
   Especially relevant: in the New Posts Revision I have included a greate Alternative to the default gnab Driver.
   So, in case of the aircrack-ng choice then follow the Github Developer Documentation to setup it.
   Especially relevant: the Aircrack-ng release include support for “Monitor mode” and “Frame injection“!