How to Install Realtek Rtl8812BU Driver Offline on Ubuntu 22.04

Installing Dependencies

2. 2. Finding Linux Headers

   Now to find the needed Linux Headers Release
   Check your current Kernel Version with:

   uname -r

   And take Note of it.

3. 3. Downloading Linux Headers

   Download Linux Headers for Ubuntu 22.04 GNU/Linux

   Linux Headers for Ubuntu

   Downloading Linux Headers for Ubuntu

   Ctrl/Cmd+f to Search for “linux-headers” on Browser.
   But if you Do Not find the Matching Versions then see instead: Installing Ubuntu 22.04 Kernel without Internet.

4. 4. Installing linux-headers Offline

   Then to Set up linux-headers Offline on Ubuntu
   First, access the Target USB Driver or Location:

   cd /[path/2/linux-headers]

   But if you are in Trouble to Find it out on Terminal then See: How to Access USB Device.
   To Check the Package is there:

   ls | grep headers

   The grep Command Refine the output List showing only the entries Matching the Keyword.
   Then simply play:

   sudo apt install ./linux-headers*.deb

   Or:

   sudo dpkg -i ./linux-headers*.deb

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

5. 5. Downloading Dependencies

   Download Required Packages for Ubuntu GNU/Linux

   Packages tar.gz Archive

   Downloading Packages for Ubuntu

6. 6. Installing Dependencies

   Then to Install Required Stuff
   First, access the Target:

   cd /[path/2/usb]

   Then to Extract the Stuff:

   tar xvzf ./dkms*.tar.gz

   cd dkms*/

   To Setup run:

   sudo dpkg -i ./*.deb

   And then in case of issue again:

   sudo apt -f install

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

   sudo reboot