Matrix is right, that's a somewhat confusing specification, but if I have interpreted correctly, this may do what you need:
Code:
cat /dev/null > ucid_output.txt
cat pw_logs.txt | while read searchstring
do
grep "$searchstring" ucid.txt >> ucid_output.txt
done
Smiling Dragon - I caught you. Here you go here is an UUOC award to you.
cat is not needed
Code:
while read searchstring
do
grep "$searchstring" ucid.txt >> ucid_output.txt
done < pw_logs.txt
Here is another variant
For every grep output, should not be ideally opening ucid_output.txt file, write into it and close it, its very expensive operation. Open it once, write contents and close it.
Code:
while read searchstring
do
grep "$searchstring" ucid.txt
done < pw_logs.txt >> ucid_output.txt
I generally do not recommend, fgrep as it o(n2) operation, try doing the same thing with hashes.
Please dont take otherwise about the UUOC award comment. Its just for fun!
---------- Post updated at 01:55 PM ---------- Previous update was at 01:53 PM ----------
Quote:
Originally Posted by Abhishek_1984
Try this one: (Not tested)
#!bin/ksh
echo "Enter the id_file_name"
read idfile
echo "Enter the inputfile name"
read infile
echo "Enter the outputfile name"
read outfile
while read line
do
id_1="$line"
grep -i $id_1 $infile>>$outfile
done<$idfile
how to grep a file based on another input file
File1
ashu 1 ninetwo hari
qwer 6 givefour jan
fghj 8 noeight mar
vbmi 7 noput feb
--
---
File2
noput
noeight
---
--
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