Thank you, I have the following which works :

#!/usr/bin/perl

use warnings;
use strict;

my $awsGone = "/ansible/awsGone";
my $awsLists = "/ansible/awsLists";

#open file for appending
open(APPEND,'>>',"$awsGone") || die("canot open $awsGone,$!"); 

#open AWSlIST file for reading
open(READ, '<', $awsLists) || die("Could not open file, $!");

#open AWSGONE file for reading
open(READGONE, '<', $awsGone) || die("Could not open file, $!");
my @gone = <READGONE>;

my @ips;
@ips = <READ>;
foreach my $addy(@ips)
{
chomp($addy);
#Test if up

my $retreval=system qq{nc -w 1 $addy 22 > /dev/null 2>&1};

##if filesd are good, leave them alone, but if bad put them in $awsGon
+e
if($retreval==0)
      {
    print "This up -> $addy\n";
        }
    else
         {
                #check if file is empty, because after ansible runs it
+ clears this file
        if(-z "$awsGone")
        {
                print "Host not up\n";
        print APPEND "$addy\n";

            #remove the dead ip from awsLists
               system qq{sed -i "/$addy/d" "$awsLists"};
        }
        else
           {
                         ##file is not empty so check if ip is already
+ in the file 
             my @match = grep{/$addy/}@gone ;
              if (@match)
               {
                print "already exists\n";
                      system qq{sed -i "/$addy/d" "$awsLists"};
                  }
                else
                {
                            print "Host not up \n";
                 print APPEND "$addy\n";
                system qq{sed -i "/$addy/d" "$awsLists"};
                }

                 }
    
           }

    }



close APPEND;
close READ;
close READGONE;
[download]

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