Overview of installing the drivers for AWUS036ACH in Kali Linux
First, run the following command to update the packages within Kali's operating system.
Next, run the following command to install the driver that supports the AWUS036ACH device.
apt -y install realtek-rtl88xxau-dkms
How to verify the driver is installed
The indicator light on the device should start to flash, indicating that the device active
In your terminal, type ifconfig to show the interfaces. You should now see an additional wireless interface (e.g. wlan1), assuming your PC already had a wireless interface called wlan0.
Troubleshooting tips if the device is not detected
Re-connect the cables to the device (the AWUS036ACH adapter) and PC to test for a physical issue.
Restart your operating system and run ifconfig again to see if the OS detects the device.
Update your Kali system packages or upgrade the entire distribution to the latest available.
Search online for other solutions that worked for others.
Why install the drivers for AWUS036ACH in Kali Linux
The main reason most security professionals use adapters like this from Alfa is that they support monitor mode which is essential for successfully executing many Penetration Tests against Wifi.