I work in an investment bank. We have a huge log file which contains FIX messages. I have a problem to grep FIX messages within a time rage (i.e. between 9:30 am to 11 pm, those were sent by CITIBANK for ticker symbol MSFT). I tried different ways but it did not work. Could anyone please help me?

Here is one of the codes in perl:

[CODE=perl]#!/usr/bin/perl –w

$myfile = “/tmp/fixlog.txt”;
open(FH,...