Login to your pi’s terminal, and run the following two commands. sudo su wpa_passphrase YOUR_SSID You’ll then be asked to enter the passphrase and confirm the passphrase. If they match; you’ll see a blurb that’s a config file fragment. Good. Now (still as su) repeat the last step, but pipe-append the output to the supplicant file. wpa_passphrase YOUR_SSID >> /etc/wpa_supplicant/wpa_supplicant.conf You won’t see the instructions this time - but that’s okay.