GNU/Linux Debian Buster Realtek rtl8723BU Driver Setup – Step-by-step Guide
How to Install Realtek rtl8723BU WiFi Driver on Debian Buster 10.x GNU/Linux – Step by step Tutorial.
And this Realtek rtl8723BU Driver Debian 10 Setup should be working also after a Kernel Upgrade with the Dkms integration.
Please be aware of How this Realtek rtl8723BU Linux Driver is build thanks to the beneficent Work of the Developer.
Especially relevant: this Driver is Not supporting all the Linux Kernels range, so in case of issue consult the available Online Documentation. And in case then see the How to Switch Kernel Guide.

1. Terminal Getting-Started
How to QuickStart with Command Line on Debian GNU/Linux
First, Update the Apt Repo Sources with:
sudo apt update
Authenticate with the User Admin Pass.
If Got “User is Not in Sudoers file” then see: How to Enable sudo.
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