Sources: aircrack-ng/rtl8812au, aircrack-ng/rtl8814au

How to Install the Netgear A7000 (RTL8812AU/21AU/14AU) Linux Wifi Drivers.

Note: This guide is purposefully simple. If you would like more information about what exactly each command is doing, try:

man `the command in question`

or go to the respective source repositories as mentioned above.