#!/usr/bin/perl -w
use strict;
use Net::Telnet;

my $log = './log.txt';

open LOG, ">>$log";         #open log file - append mode
open IPS, "<ip.list";       #open ip.list file - read mode
while(<IPS>){
 my $ip = $_;               #current iteration (line) of IPs file
 $telnet = new Net::Telnet ( Timeout=>10,
         Errmode=>'die'
         Prompt => '/# $/i');
 $telnet->open($ip);
 $telnet->login('USERNAME', 'PASSWORD');
 if($telnet->cmd('CommandA')){
  print LOG "$ip CommandA successful";
 }else{
  print LOG "$ip Unable to Connect";
 }
}
close LOG;                  #close files
close IPS;