Step-by-step – Realtek Rtl8812BU Elementary OS 5 Driver Installation

Downloading

4. 4. Downloading Realtek rtl8812BU Driver

   Download Realtek rtl8812BU Driver in Elementary OS GNU/Linux

   Get Realtek rtl8812BU Driver in Elementary OS

   Realtek Driver Source Code for Elementary OS

   Grab the Zip Archive or clone it with Git.
   
   In this New Post Revision in addition to the default Cilynx Driver choice I’ve added also the Morrownr, RinCat, Aircrack-ng and Gnab eventual Alternatives.
   So in case, then see directly the Developer Github Documentation to Setup it!

5. 5. 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