One option is to create a directory in your log files' directory for the prepped log files, so the originals aren't altered. Given that the log files' format is as shown, consider the following which writes prepped files into a directory called prepped:

use strict;
use warnings;

my $pcName;
local $/ = ''; # paragraph mode

for my $file (<*.log>) {
    open my $fhIN, '<', $file or die $!;
    open my $fhOUT, '>', 'prepped/' . $file or die $!;

    while (<$fhIN>) {
        chomp;
        print $fhOUT $_ if /\n/; # first two file lines
        next if /^(PCName:\s+.+)/ and $pcName = $1; # pc name & next
        print $fhOUT "\n\n$pcName\n$_"; # print pc name & command
    }

    close $fhIN;
    close $fhOUT;
}

[download]

Sample file output from your data:

PCName: Foo1
Command1:dfie

PCName: Foo1
Command2:dfo

PCName: Foo1
Command3:dfum

PCName: Foo2
Command1:dfie

PCName: Foo2
Command2:dfo

PCName: Foo2
Command3:dfum

[download]

The fileglob operator <*.log> is used to get the list of files in the log directory; you may need to change the file extension.

Hope this helps!

In reply to Re: File Find/Replace with the replacement coming from part of earlier matched string by Kenosis
in thread File Find/Replace with the replacement coming from part of earlier matched string by navinc

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