UNIX for Dummies Questions & Answers

file1="`md5sum filename1 |cut -d ' ' -f 1`"
file2="`md5sum filename2 |cut -d ' ' -f 1`"

if [ $file1 =  $file2 ]
then
        echo "remove the second file" ;
        # remove the second file using rm command
else
        echo "keep quite" ;
fi

comm -13 <(sort file1) <(sort file2) > file2.tmp && mv file2.tmp file2

# compare the contents of two file , if same delete 2nd one

echo -n "Enter file 1:"
read file1
echo -n "Enter file 1:"
read file1

if [ `diff $file1 $file2 >/dev/null`  -eq 0 ]
then
	echo Same

else
	echo Different
	rm $file2
fi

file1.txt                                      file1.txt
----------                                     -------------------------
bash-3.1# cat file1.txt            bash-3.1# cat file2.txt
1                                                1
2                                                2
3                                                3
4                                                4
5                                                5
6                                                6

#!/bin/ksh
diff filename1 filename2 >/dev/null
if [  `echo $?` -eq 0 ]
then
    echo Same

else
    echo Different
    #rm -f filename2
fi