Step-by-step – Realtek Rtl8812BU Linux Mint 19 Driver Installation

Installing Requirements

2. 2. Updating System

   So first, to Upgrade Linux Mint 19
   Play:

   sudo apt upgrade

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.
   In case a New Kernel is installed then reboot executing:

   sudo reboot

   Then check if a Kernel 5+ is already installed
   With:

   uname -r

   If Not then see: How to Install Kernel 5.x in Linux Mint 19

   Kernel 5.x Linux Mint 19 Setup Guide

   Kernel 5.x Linux Mint 19 Installation Tutorial

3. 3. Installing Dependencies

   Then to Install Required Stuff
   Run:

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

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

   sudo reboot