Hi senthilkumar_ak,

You can use Perl. It will give you better results than grep i think.
Here are few tips for searching ...
1. do not store the file contents in an array, if the file size is huge
2. loop thru using the file handle ex: while (my $line = <FILE>) {
3. to make things faster, use variables as counters. If you want to match say 5 times ... you need not have to parse the entire file in loop, exit after 5 matches using a counter var.

Regards,
Visit my Perl blog for tips on Perl,
TechDiary

Thanks vikas.. I am beginner in perl i will use your tips, may be i will come up with some query to you if i encountered any errors.