GNU/Linux TP-Link TL-WN821N V5/V6 Driver Setup Guide
Hi! The linked Tutorial Shows You Step-by-Step How to Install TP-Link TL-WN821N V5/V6 Wireless 802.11ac Driver in GNU/Linux Desktop.
And the Linux TP-Link TL-WN821N V5/V6 Adapter is based on the Realtek rtl8188EU Chipset.
So here below you find instructions to Install rtl8188EU Driver on Linux
Especially relevant, if you are Unsure about your Wi-fi Interface ID first see: How to Check Wireless Adapter Model on GNU/Linux.