“I have an Ubuntu Linux PC and I bought a wifi adapter before but the drivers were not proper and I am not able to use it. Can I use this on a Ubuntu PC ?”
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Yes if you are comfortable with the terminal there is a way around it. You should be able to install the driver from the driver manager or by using this command in terminal with an ethernet connection sudo apt update && sudo apt install bcmwl-kernel-source https://askubuntu.com/a/1163018/300665 The good news is that your 0bda:c811 device has support and has been the subject of several answers and duplicates here before; for example: USB WIFI Realtek not an MTP device The bad news is that the previous driver files will not properly compile on Ubuntu 19.04 using a 5.0.0-xx kernel version. I recommend that you use another method. With a temporary working internet connection, open a terminal and do: sudo apt update sudo apt install build-essential git dkms git clone https://github.com/brektrou/rtl8821CU.git cd rtl8821CU chmod +x dkms-install.sh sudo ./dkms-install.sh It builds successfully, albeit with a few possibly harmless warnings, on my 5.0.0-23 system Next, do: sudo modprobe 8821cu Your wireless should now be working. Good luck no promises made, tweak at your own expense. Will not be held responsible for mis-typed commands. I did this on my machine running Ubuntu 20.04.3 If you want a no nonsense approach go here: https://www.thinkpenguin.com/gnu-linux/penguin-wireless-n-usb-adapter-gnu-linux-tpe-n150usb Twice the price but guaranteed to work
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