GNU/Linux Realtek rtl8821AE Driver Installation Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install Realtek rtl8821AE Wireless Driver in GNU/Linux Computers.
And the Realtek rtl8821AE Linux Driver Installation is Quick & Easy, involving at most the execution of some Basic Shell Commands.
Please be aware of how this Driver is Not supporting all the Linux Kernels range, so in case of issue consult the available Online Documentation.
So as a possible Solution, then you may also see: How to Install New Kernel Guide.
Again, in case of Issue for preventing any possible Driver loading Interference you should also take into account: How to Blacklist Kernel Modules.
Installing Realtek rtl8821AE Driver on Linux
How to Install Realtek rtl8821AE Wifi Driver in GNU/LinuxHere Linux Realtek rtl8821AE Installation