I ended up with a different checksum on one of the compiled files (core/rtw_mlme_ext.o) and I'm not sure if that's normal or not. Install the WiFi modules.  I don't have a LAN connection where my television set is (the only HDMI enabled device I have at the moment), though I've just ordered an 8" HDMI monitor, so I need to get WiFi working and although T3Node.com have made a module available, I'm stuck on getting that onto the SD card as I can't access the boot partition as I can't get Root access. It's been a long time since I used 'Nix fullstop, so perhaps I can get to the Root partition via the shell. @bodgyuk ah, ok. I understand better now. Are you able to mount the Linux partition from the Debian SD card on your PC? If so, then you could copy the module over per the T3 instructions. You also need rtl8712u.bin from the firmware-realtek package. I"ve uploaded it here: https://www.dropbox.com/sh/i15azhv761rw0\\... . That file needs to be copied to /lib/firmware/rtlwifi/rtl8712u.bin on the SD card. Then you should be able to boot on your TV and run "sudo depmod -a" from the shell. This should make the system recognize the new r8721u.ko you"ve copied over. Then when you insert your adapter the kernel should load the r8712u module. Some of this sounds familiar from when I tried the same process.  Are you using a USB Hub ( which one ?) or connecting direct to the Pi.  There are