Generate SHA512 passwords for /etc/shadow

generate_password.sh

#!/bin/bash

type -P chpasswd  2>&1 > /dev/null

if [ $? -ne 0 ]; then
	echo "chpasswd not available"
	exit 1
fi

read -p "Username: " USERNAME
echo -n "Password: "
read -s PASSWORD1
echo ""
echo -n "Verify password: "
read -s PASSWORD2
echo ""

if [ "a${PASSWORD1}" != "a${PASSWORD2}" ]; then
	echo "Passwords do not match."
	exit 2
else
	echo "${USERNAME}:${PASSWORD1}" | chpasswd -S -c SHA512
fi