cd $HOME
git clone https://github.com/abperiasamy/rtl8812AU_8821AU_linux rtl8812au
sudo cp -R rtl8812au/ /usr/src/rtl8812au-1.0
sudo dkms add -m rtl8812au -v 1.0
sudo dkms install -m rtl8812au -v 1.0

# now unload the existing module and load the new module

sudo modprobe -r eth9k
sudo modprobe 8812au