#!/bin/bash

[ "$#" -ne 2 ] && echo "Usage: $0 <filename> <expected_hash>" && exit 1

FILE="$1"
EXPECTED="$2"

[ ! -f "$FILE" ] && echo "Error: File not found!" &&	exit 1

CALCULATED=$(sha256sum "$FILE" | awk '{print $1}')

echo "Expected:   $EXPECTED"
echo "Calculated: $CALCULATED"

[ "$CALCULATED" = "$EXPECTED" ] && echo "Hash matches!"  || echo "Hash does NOT match!"