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Lets we know that how to fix the parrot OS wifi problem:-


After installing parrot OS there is a major problem with the Wifi network
it doesn't work unfortunately, the reason is there is no wifi driver support so that probably your wifi driver is missing on parrot os installation, you can see the icon at the top right corner to connect through ethernet

                                     
as mentioned in the screenshot

but this problem can be solved by installing/updating the correct driver.

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Step:1
Download the latest appropriate wifi driver from GitHub according to your wifi card, you can see manuals or check-in windows os to do this run cmd as administrator and check the output of below cmd
    
    netsh wlan show profiles interface

In my case, I have an rtl card and I got zip from GitHub and
downloaded a zip named as extended.zip
Your pc might have rtl wifi card build so you can check my given file here.
to download >>click here
extract it and open folder and open terminal in that directory

 note:- this may be outdated and you should check the wifi drivers codes on GitHub by doing a search on google according to your wifi card and you can found all the installation instructions.


Step:2
in terminal run,

apt get update && apt get upgrade then,

type following commands
1- sudo make
2- sudo make install
3- sudo modprobe rtl8822be 
note:- you can also use other listed module name instead rtl8822be 
that's it, your wifi will work like a charm
         
                       
                     

Step:3

sometimes wifi single becomes very weak, to solve this problem use following commands 

sudo tee /etc/modprobe.d/rtl8822be.conf <<< "options rtl8822be ant_sel=2"
(or ant_sel=1 if 2 doesn't help)


and rtl8822be can be replaced according to your wifi card.

 note:- try to enable legacy mode and disable secure boot in bios setup if you still facing an error.


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