I have just installed Ubuntu 16.04 and nether wire connection works or wirless. Now I have bought a PCI adapter from https://www.tp-link.com/us/download/Archer-T9E.html#videos I have followed the link: How to install TP-LINK Archer T4U driver? but it didn't worked for me ~/Desktop/rtl8812AU_8821AU_linux-master$ sudo modprobe rt18812au
modprobe: FATAL: Module rt18812au not found in directory /lib/modules/4.13.0-38-generic
Does anyone know what does it mean or how can solve this ?