if [ "$1" = "" -o "$2" = "" ]; then
	echo USAGE: $0 \<correct MD5 sum\> \<file\>
	exit 1
fi

echo "$1  $2" >md5sum.txt
if [ ! -f $2 ]; then
	echo $2 does not exist!
	exit 1
fi
md5sum --check md5sum.txt || exit 1
rm md5sum.txt