genpassphrase.sh

#!/bin/bash
# Author URI: https://github.com/billz/

# Use /dev/random to generate a strong random passphrase.
# If pronounceable, but less secure, passphrases are desired, install gpw (sudo apt install gpw)
# and replace it with: gpw 1 24
readonly HOSTAPD="/etc/hostapd/hostapd.conf"
readonly PASSPHRASE=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 32 ; echo '')
echo "Your new passphrase is: ${PASSPHRASE}"

# Update hostapd.conf wpa_passphrase
sudo sed -i "s/\(wpa_passphrase=\).*/\1${PASSPHRASE}/g" "$HOSTAPD" || { echo  "Unable to modify hostapd.conf" && exit; }

# Restart RaspAP for change to take effect
sudo systemctl restart raspapd.service || { echo  "Unable to restart raspapd.service" && exit; }