Hi,

I miss ed out the output in earlier post.

Currently, my input file of A.txt

aaa 1
bbb 2
ccc 3
ddd 100

B.txt

2 3 4
3 4 5

My code so far is:-

#!/bin/bash

cat a.txt| while read LINE
do

#to get the second field of a.txt
char=`echo "${LINE}"| awk '{print $2}'`

echo $char

#to grep the line position of b.txt which match the element in a.txt
grep -n $char b.txt | tr ":" " "| awk '{print $1}'

done

The output is:-
1

2
1

3
1
2

100

The problem here is i) grep does not want to recoqnize only the first field of b.txt (which you can see for 3 in a.txt there is 1, 2 returned because there is "3" in b.txt for two entries.

ii)And there is problem if I applied grep -m 1 $char b.txt|awk '{print $1}'
for printing the matching element for first field of b.txt. The output would be

1

2
2

3
2

100


Ultimately, what I would like to have the desired otuput is:-

1 Not Found
2 Position 1 3+4
3 Position 2 4+5
100 Not Found


Thanks.
-Jason