GNU/Linux CentOS Alfa AWUS1900 Setup Guide Hi! The linked Tutorial Shows You Step-by-Step How to Install Alfa Network AWUS1900 Wireless 802.11ac Driver in CentOS GNU/Linux. And the CentOS Linux Alfa AWUS1900 Setup is based on the Realtek rtl8814AU Chipset Driver Installation. Eventually, follow the included instructions to Download and Install RTL8814au Linux Firmware. GNU/Linux CentOS Alfa AWUS1900 Wireless Driver Installation Guide Alfa AWUS1900 CentOS Wireless Driver Installation Guide