Realtek Rtl8821CU Driver Ubuntu 18.04 Installation – Step-by-step

Installing

2. 2. Enabling Realtek rtl8821CU Driver PPA

   Add Realtek rtl8821CU Driver PPA for Ubuntu GNU/Linux

   Enabling Realtek rtl8821CU Driver Repo for Ubuntu

   Realtek rtl8821CU Driver PPA for Ubuntu

3. 3. Installing Realtek rtl8821CU Driver

   Then to Install Realtek rtl8821CU Driver in Linux
   Currently 2 Flavors of the Driver are available.
   For the default one run:

   sudo apt install rtl8821cu-dkms

   Instead for the Latest Kernels you may try:

   sudo apt install rtl8821cu-next-dkms

   Finally, in case of Issue to remove it:

   sudo apt-get purge rtl8821cu*