Step-by-step – Realtek Rtl8821AU Driver CentOS Installation

Downloading

2. 2. Installing Dependencies

   Then to Install Required Stuff
   First, possibly Upgrade your system with:

   sudo dnf upgrade

   In this case after reboot:

   sudo reboot

   Then run:

   sudo dnf groupinstall "Development Tools"

   Further you may need also the C Libraries:

   sudo dnf groupinstall "C Development Tools and Libraries"

   How to Enable Powers Tools on CentOS 8

   Enabling CentOS 8.x/Stream-8 Powers Tools

   How to Enable CentOS 8.x/Stream-8 Powers Tools Guide

   And again:

   sudo dnf install dkms kernel-headers kernel-devel elfutils-libelf-devel unzip git

   On CentOS 7 and below simply replace “dnf” with “yum” in the above Command.
   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

3. 3. Downloading Realtek rtl8821AU Driver

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

   Get Realtek rtl8821AU Driver in CentOS

   Realtek rtl8821AU Driver Source Realtek for CentOS

   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“!

4. 4. Extracting Realtek rtl8821AU Driver

   And then Extract Driver Archive into /tmp
   (Skip in case of Git Checkout)
   Possibly Double-Click/Right-Click on Package and Open with Archive Manager:

   
   Or from Command Line:

   unzip -d /tmp/ ~/Downloads/*master.zip