I have a file with a list of 4 digit numbers. I would like to loop through the list, place the current number in a variable and then grep that number from another file. In the other file the number is held as "xxxx" in the part that I need to match it to. There are lots of other numbers on the same record in the second file hence the need for keeping the double quotes.

eg Number 4321
Grep '"4321"' myfile.001 >> newfile

Need it to be:

MyVar = 4321
Grep '"MyVar"' myfile.001 >> newfile

I know nothing in UNIX hence this relatively easy question!

Thanks in advance

Hi,

MyVar=4321
grep ${MyVar} myfile.001 >> newfile

Thanks Frank,

How do I keep the double quotes around the variable?

In the search file the records would be:

"01","001005006","5869","02084321254"
"01","001005008","4321","9123" etc

In the above example I want to return the second record because of "4321" rather than the first where it would be returned due to 4321 turning up in the last field. Hence why I need "4321" in the grep rather than 4321

Try:

while read teststring
do
grep \"${teststring}\" dummy.sh
done < master.lst

If you are using k shell,

Try,

grep -w ${teststring} filename >>newfile

deeps

Hi,
MyVar=4321
grep \"${MyVar}\" myfile.001 >> newfile

would also work.
What deeps suggested is ok but didn't work on HPUX. Because HP don't know the -w option.

Have fun
Frank