See also reboot a system (machine or server) multiple times with perl script, where you ask the same question.

In general, it helps to stay with one thread for one question instead of repeatedly posting the same question with minor variations over and over.

Welcome. You say you've had trouble but you don't say what has gone wrong. What have you tried, how did it fail? If you are new to Perl I suggest you take the time to work through the basics:

• Please read and understand How do I post a question effectively?.

• perlintro
• http://learn.perl.org
• http://perldoc.perl.org
• The tutorials section of this site

Reporting specific problems will likely result in better answers than you'll get from simply posting the requirements you have to fulfill.

use warnings;
use strict;

open $my file, '<', "C:/reboot_attempts";

read $file, my $reboot_number, 1;

if ($reboot_number == 0){
    open my $file, '>', 'reboot_attempts';
    print $file '1';
    close $file;
    #reboot machine;
}
if ($reboot_number == 1){
    open my $file, '>', 'reboot_attempts';
    print $file '2';
    close $file;
    #reboot machine;
}
if ($reboot_number == 2){
    open my $file, '>', 'reboot_attempts';
    print $file '3';
    close $file;
    #reboot machine;
}
if ($reboot_number == 3){
    open my $file, '>', 'reboot_attempts';
    print $file '4';
    close $file;
    #reboot machine;
}
if ($reboot_number == 4){
    open my $file, '>', 'reboot_attempts';
    print $file '5';
    close $file;
    #reboot machine;
}
if ($reboot_number == 5){
    open my $file, '>', 'reboot_attempts';
    print $file '0';
    #exit;
}
[download]

I don't think you know what a boot partition is. Suggesting that a novice alter his boot partition is tantamount to suggesting he play Russian Roulette with all chambers loaded. Perhaps you meant to say root directory (although where the file resides doesn't really matter).

use warnings;
use strict;
my $max_attempts = 5;

# for windows, replace cat with type
my $reboot_number = `cat reboot_attempts` || 0;
if ($reboot_number++ < $max_attempts) {
  `echo $reboot_number > reboot_attempts`;
  print "Rebooting...\n";
  # code to make computer reboot here
}
[download]

Dum Spiro Spero

Apologies, ofcourse i meant boot drive. But in windows, my boot drive is my boot partition, because it is a 512gb ssd unpartitioned.

Either way the point was to write and/or modify a file per reboot.

well the o.s here is ubuntu.