Step-by-step – Linux Mint 19 Realtek RTL8168 Driver Installation

Installing Apt Driver

2. 2. Installing RTL8168 Apt Driver

   Then to Install Realtek RTL8168 Apt Repo Driver
   Simply run:

   sudo apt install r8168-dkms

   And then Reboot with:

   sudo reboot

   In case of Issue use “apt remove” to delete it and then Reboot.
   But if Not found then See:
   How to Enable Universe Repo for Mint GNU/Linux

   Add Universe Apt Repo for Mint

   Universe Repository for Mint Setup Guide