Shell Programming and Scripting

#!/usr/bin/ksh
dir1=xxx
dir2=yyy
now=$PWD
cd $dir2
for f in *
do
     cat $f  |  md5sum | read strA1 strA2
     [ ! -f $now/$dir1/$f  ] && print "$f not exist in dir1 " && continue
     cat $now/$dir1/$f | md5sum | read strB1 strB2
     [  "$strB1"  = "$strA1" ] && print "$f files are maybe same" && continue
     print "$f are not same"
done

#!/usr/bin/ksh
dir1=/A
dir2=/B
now=$PWD
cd $dir1
for f in *
do

     [ ! -f $now/$dir2/$f  ] && echo "$f not exist in B " && continue
     [  "$strA1"  = "$strB1" ] && rm -r $f && continue

done

function sub
{
	file=${1##*/}
	echo "File $1 exist, would like to Merger(1)/delete(2)?"
	read opt
	if [ $opt -eq "1" ];then
	  cat $1 >> $2/$file
	else
		rm $1
	fi
}
for file in `ls dir1`;do
  tmp=dir2/${file}
  if [ -f $tmp ];then
  	sub $tmp 'dir1'
  fi
done

#!/bin/sh               
for file in `ls /B`;do         
tmp=/A/${file}         
if [ -f $tmp ];then               
rm -r $tmp         
fi       
done