Just installed Ubuntu, how do I install Internet drivers?

as of right now I have no way of connecting to the wireless networks in my fresh install of Ubuntu 15.04. My wireless adapter is a TP-Link Archer T4u ac1200. I have another computer that I will be able to install drivers from over USB, but I'm not sure how. I have absolutely no internet at all and also, I can't install drivers in additional software either. I'm pretty sure Ethernet will work but I am unable to move my PC downstairs near my modem. How can I make it so that I can connect to wifi?

Edit

The output of lsusb

Bus 004 Device 002: ID 8087:8000 Intel Corp.
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 8087: 8088 Intel Corp
Bus 003 Device 001: ID 1d6b:0002 Linux foundation 2.0 Root hub
Bus 002 Device 001: ID 1d6b:0003 Linux foundation 3.0 root hub
Bus 001 device 006: ID 04b4:1007 Cypress Semiconductor Corp
Bus 001 Device 006: ID 0bc2:ab10 Seagate RSS LLC
Bus 001 device 003: ID 1b1c:1b12 Corsair
Bus 001 device 007: ID 0d8c:016c C-Media electronics, INC
Bus 001 device 001: ID 1d6b:0002 Linux foundation 2.0 root hub

I obviously see my M65 RGB (Corsair) and my external HDD (Seagate RSS LLC) but I'm not too sure about my keyboard, which is an AZIO MGK1-RGB.

1 Answer

One of the packages you need, dkms, is on the install DVD or USB; insert it and drill down to pool > main > d > dkms and drag dkms to you desktop. Then install:

cd ~/Desktop
sudo dpkg -i dkms*.deb

Now download this package on some other computer and transfer it by USB or similar to your desktop: Right-click it and select 'Extract Here.' Now, back to the terminal:

cd ~/Desktop
sudo dkms add ./rtl8812AU_8821AU_linux
sudo dkms install -m 8812au -v 1.0

Reboot and your wireless should be working.

NOTE: This depends on the presence of build-essential and linux-headers-generic. Please check:

sudo dpkg -s build-essential
sudo dpkg -s linux-headers-generic

If either is not installed, I will edit my answer to propose a further solution.