CentOS 9 Realtek RTL8821cu Driver Installation – Step-by-step

GNU/Linux CentOS Stream 9 Realtek RTL8821cu Driver Setup – Step-by-step Guide

Hi! The Tutorial shows you Step-by-Step How to Install Realtek RTL8821cu Wireless Driver in CentOS GNU/Linux 9.

Especially relevant: this Realtek RTL8821cu Driver CentOS Stream 9 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.

Finally, this Setup is Valid also for All the others Red Hat Linux Based Distros like:

• Red Hat Enterprise Linux
• Oracle Enterprise Linux
• Rocky Linux
• AlmaLinux

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
   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 9

   Enabling CentOS Stream 9 Powers Tools

   How to Enable CentOS Stream 9 Powers Tools Guide
   And again:

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

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