hello friends i am using kali linux on my laptop and my laptop's internal wifi adapter is not working so i have external usb adapter . now after the installation i plug my wifi adapter and linux is not showing it and i also dont no how to install its driver so help me what should i do in this situation . driver folder--

external wifi adapter--(exabyte)Realtek Semiconductor Corp. RTL8188FTV 802.11b/g/n 1T1R 2.4G WLAN Adapter

2 Answers

Alright. Better strap in, because it's going to be a long one:

1. Open your terminal and start working.
2. Run lsusb -v, which should give you an output similar to this:

06:00.0 Network controller: Realtek Semiconductor Corp. RTL8188FTV Subsystem: Realtek Semiconductor Corp. Kernel driver in use: iwlwifi Kernel modules: iwlwifi

3. Since the adapter is an USB adapter, you run dmesg | grep usbcore as root, which should give you an output similar to this usbcore: registered new interface driver rtl8188.
4. Check if the wireless interface has been created using ip link. If the adapter has been created the name of the adapter should start with a 'w' (e.g. wlan0; wlp2s0).
5. Use the ip link set [YOUR INTERFACE] up command to bring up your interface (e.g. ip link set wlan0 up. If you get an error message, please provide it by commenting the answer I'm providing you.
6. Check the kernel messages if the firmware is being loaded with dmesg | grep firmware, which should yield something like this:

[ 7.148259] iwlwifi 0000:02:00.0: loaded firmware version 39.30.4.1 build 35138 op_mode iwldvm

7. If there is no erroneous output to the command in step 6, use dmesg | grep [FIRMWARE] (in the case of step 6, it was iwlwifi. Again, yours may be different).
8. If the kernel module was loaded properly, you can proceed to the next step in the Arch wiki (#Utilities)

I checked the support from the Kernel wiki and I suspect that your device may not be supported.

Again, I suggest following the Arch wiki - Wireless network configuration, which provides a fantastic way to solve your issue. This goes for general Linux issues as well. It is very easy to follow and it is aimed at beginners and proficient users alike.

ip link set wlan0 up 1 ⨯

RTNETLINK answers: Operation not permitted