Probably you see it yourself if I modify the layout of your code:

my $answer ;
my $quit = 0 ;

until ($quit) {
  getprint("http://132.163.4.101:13") ;
  getprint("http://132.163.4.101:13") ;
  getprint("http://132.163.4.101:13") ;
  getprint("http://132.163.4.101:13") ;
  getprint("http://132.163.4.101:13") ;
  print "Do you  want to continue?  " ;
  $answer = <STDIN> ;
  chomp $answer ;
}

if ($answer ne 'y') {
  print "OK\n" ;
} else { 
  $quit = 1 ;
  die "OK!\n\n" ;
}

print "Good-bye!\n\n" ;
[download]

You are never altering $quit in the loop ... so it can't terminate ;-)

-- Hofmator