system("tail -10 inputFile.txt >> outputFile.txt");

open <FILE, "</path/to/outputFile.txt"> or die "can't open file: $!\n";
   #do whatever here
close FILE or die "can't close file $!\n";

##</code><code>##

@input = <FILE>;
$i = 0;
foreach ($line (@input)) {
   $i++;
   if ($i >= 1034 || $i <= 1047) {
   #process here
   } 
}
close FILE or die "can't close file: $!\n";