remove files with equal size

rmdubsize.sh

#!/bin/sh

echo "" > zduplog.txt
a='zduplog.txt'
size_a=`stat -c %s $a`
for b in `ls`
do
    size_b=`stat -c %s $b`
    if [ $size_a -eq $size_b ];
    then
	echo 'Duplicate file: '$a' size_a = '$size_a' size_b = '$size_b >> zduplog.txt
	rm $a
    fi
    a=$b
    size_a=`stat -c %s $a`
done