In order to prepare my RPi for connecting to Wifi, I need to do some changes as per this answer.
Now, I cannot find the file:
wpa_supplicant.conf in the boot directory. Hence, I need to create it and then save the mentioned changes. The issue is: I am unable to write into the directory. File cannot be saved and it shows "read only disk." I have tried
sudo chmod -R 777 boot/ but in vain.
Note: I am using a memory card reader to read the card used in the RPi.