How to know the Wifi Password in Windows/Linux/MAC OS:

1. Windows OS:

         Open the command terminal as : cmd 

         Run the following command:

         netsh wlan show profile name=[wifi-name]  key=clear 

         Now, under the Security Settings section, Value 'Key Content' is the Wifi Password.

       2.  MAC OS:

          

          Open the terminal & fire the following command:

          security find-generic-password -wa [wifi-name]

          The result displayed in plain text is the Wifi Password.

      3. Linux OS:
         Open the terminal and run following command
         cat /etc/NetworkManager/system-connections/[wifi-name] | grep psk=