Install Alfa AWUS036ACH on Ubuntu 18.04

Alfa AWUS036ACH is an external WiFi adapter with a USB 3.0 interface. Its most remarkable features are the high power it has and its ability to inject packets. It’s a great device for security tests on wireless networks. I wonder if this device has out of the box support with package injection in the latest kernels, but on Ubuntu 18.04 it’s necessary to install the driver, as it is not recognized by default.