#!/usr/bin/perl
use warnings;
use Net::Ping;
use Socket;

print "Enter the subnet you wish to scan just the first 3 octet's\n";
$ipnumber =<STDIN>;
chomp $ipnumber;
@iparray = map $ipnumber. ".$_",1..254 ;
print @iparray;
#open (ERRORLOG, ">errorlog");
open (OFFLINE,">offline");
#my @iparray = qw( www.slashdot.org www.deja.com  www.perlmonks.org );


my $proto = 'icmp';
my $def_timeout = '0';
my $bytes = '64';

my $p = Net::Ping->new($proto,  $def_timeout , $bytes);

foreach my $host (@iparray) {
  $| = 1;
     print "$host online \n" if $p->ping($host);
     print "$host offline \n" unless $p->ping($host,1);
     print "$host \n" unless $p->ping($host,1);
}
$p->close();
close OFFLINE;
#close ERRORLOG;


open (IPLIST, "offline");
#open (OFFLINEHOST, ">offlinehost");
@list=<IPLIST>;
$list = @list;
#print "@list\n";
chomp @list;
my $i;
my $peer_host;
format STDOUT_TOP =
IP#              Machine name
---------------- ------------------------------------
.
format STDOUT =
@<<<<<<<<<<<<<<< ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$i,         $peer_host
.
foreach $i (@list) {
$peer_host = gethostbyaddr(inet_aton($i), AF_INET);
#$peer_host = gethostbyaddr(inet_aton($i), AF_INET);
#print OFFLINEHOST "$peer_host and ipaddress $i\n";
#print OFFLINEHOST "$peer_host and ipaddress $i\n";
write
}
close OFFLINE;

[download]
For some reason it seems the format command splits the list why is that

In reply to Ping Check code by muaddib2

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.