#!/usr/bin/perl use strict; use warnings; open (IN,"testdata.dat") or die; open (OUT,">>./someRN.txt") or die; my $i=1; while (<IN>) { chomp; if ($i>=2&&$i<=4) { #..1000.2000........LZ........... print OUT "$_\n"; } $i++; } seek(IN,0,0); $i=1; while (<IN>) { chomp; if ($i>=6&&$i<=8) { #..1000.2000........LZ........... print OUT "$_\n"; } $i++; } close IN; close OUT;