Install the driver first from github:
sudo apt-get install git git clone https://github.com/abperiasamy/rtl8812AU_8821AU_linux cd rtl8812AU_8821AU_linux sudo cp -R . /usr/src/rtl8812AU_8821AU_linux-1.0 sudo dkms add -m rtl8812AU_8821AU_linux -v 1.0 sudo dkms build -m rtl8812AU_8821AU_linux -v 1.0 sudo dkms install -m rtl8812AU_8821AU_linux -v 1.0
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