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[Solved][Linux] No Wi-Fi Adapter Found – Make sure you have a Wi-Fi adapter plugged and turned on

Recently I reinstall my Linux operating system. In the process of installation, I disconnected to my Wifi device. But before I reinstall it, the device connected to Wifi is very successful.

I think my Wifi device is good-to-work.

So after I configuring the desktop environment, I opened the wifi setting window, saw a conspicuous warning right there:

No Wi-Fi Adapter Found - Make sure you have a Wi-Fi adapter plugged and turned on


Finally, by installing fireware-iwlwifi, I successfully made the wifi device work.

Solution: Install fireware-iwlwifi

If I use iwconfig command to check my wireless device.

iwconfig


Output:

enp8s0    no wireless extensions.

lo        no wireless extensions.


There are two no wireless extensions.



Then I try to install firmware-iwlwifi.

sudo apt update
sudo apt install firmware-iwlwifi

sudo modprobe -r iwlwifi
sudo modprobe iwlwifi



Then we check them again:

iwconfig


Output:

enp8s0    no wireless extensions.

lo        no wireless extensions.

wlp7s0    IEEE 802.11  ESSID:"Clay"  
          Mode:Managed  Frequency:5.785 GHz  Access Point: 3A:50:14:66:E6:26   
          Bit Rate=433.3 Mb/s   Tx-Power=22 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=70/70  Signal level=-35 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:40  Invalid misc:34   Missed beacon:0


The ESSID:"Clay" is the configuration by myself, you can ignore it. But if the above commands work, you will find a new interface.

Good Luck.

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