1. read a log file
2. search the logfile.txt for a specific string, in this case the string "TWO"
3. extract record that contains the string "TWO" from log file into another file 

##</code><code>##

#!/usr/bin/perl -w
use strict;
use IO::File;
use constant FILE => 'b2bclient-gateway-heartbeat.log';
use constant FIND => 'production';
IO::File->input_record_separator(FIND);
my $fh = IO::File->new(FILE, O_RDONLY) or die 'Could not open file ', FILE, ": $!";
$fh->getline;
#fast forward to the first match, print each occurence in the file
print IO::File->input_record_separator

while $fh->getline;
$fh->close;

##</code><code>##

2007-Nov-07 00:00:00 UTC (GMT +0000) - Poll: channel = ONE, ref =
2007-Nov-07 00:00:01 UTC (GMT +0000) - Poll: channel = TWO, ref =
2007-Nov-07 00:00:01 UTC (GMT +0000) - Poll: channel = TWO, ref =
2007-Nov-07 00:00:02 UTC (GMT +0000) - Poll: channel = THREE, ref =
2007-Nov-07 00:00:02 UTC (GMT +0000) - Poll: channel = TWO, ref =
2007-Nov-07 00:00:03 UTC (GMT +0000) - Poll: channel = TWO, ref =
2007-Nov-07 00:00:03 UTC (GMT +0000) - Poll: channel = TWO, ref =
2007-Nov-07 00:00:04 UTC (GMT +0000) - Poll: channel = TWO, ref =