Realtek Rtl8812BU Debian Bullseye Driver Installation – Step-by-step

Installing

6. 6. Installing Realtek rtl8812BU Driver

   Then to Install Realtek rtl8812BU Wi-fi Driver for Debian
   Access the Target Folder:

   cd /tmp/rtl88x2bu*

   Next to prepare the setup play:

   VER=$(sed -n 's/\PACKAGE_VERSION="\(.*\)"//p' dkms.conf)

   sudo rsync -rvhP ./ /usr/src/rtl88x2bu-${VER}

   Then add it to DKMS:

   sudo dkms add -m rtl88x2bu -v ${VER}

   Again build it with:

   sudo dkms build -m rtl88x2bu -v ${VER}

   Install it into DKMS System:

   sudo dkms install -m rtl88x2bu -v ${VER}

   Long last try to fill it up with:

   sudo modprobe 88x2bu

   Or in case, try Rebooting with:

   sudo reboot

   And you should successfully see your Wifi Adapter magically popping up from nowhere! :)
   Possibly, to load it at Boot time:

   echo 88x2bu | sudo tee -a /etc/modules

   Thanks to Randy C. Will inestimable Work!

Congratulations, your Realtek rtl8812BU Network Device on Debian Bullseye should be now nicely working!