Realtek Rtl8812BU Ubuntu 23.04 Driver Installation – Step-by-step

Installing

3. 3. Extracting Realtek rtl8812BU 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:

   
   But if you are in Trouble to Find the Location on Terminal then See: How to Access Downloads Folder from Browser.
   Or from Command Line:

   unzip -d /tmp/ ~/Downloads/rtl88x2bu*.zip

4. 4. Installing Dependencies

   Then to Install Required Stuff
   First, possibly, upgrade your System with:

   sudo apt upgrade

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.
   And if a New Kernel is installed then restart with:

   sudo reboot

   So then run:

   sudo apt install build-essential linux-headers-$(uname -r) dkms git

5. 5. Installing Realtek rtl8812BU Driver

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

   cd /tmp/rtl88x2bu*

   Next to prepare the setup play:

   VER=$(sed -n 's/\PACKAGE_VERSION="\(.*\)"/\1/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 Ubuntu 23.04 should be now nicely working!