$in_file = "test.txt"; $out_file = "testout.txt"; open (IN, "<$in_file") or die "Can't open $in_file: $!\n"; open (OUT, ">$out_file") or die "Can't open $out_file: $!\n"; while ( $line = ) { @fields = split /,/, $line; $line = join ",", $fields[0], @fields[1..5]; print OUT $line; print OUT "\n"; } close IN; close OUT; #read in output file and print to screen to confirm open (TEST, "<$out_file") or die "Can't open $out_file: $!\n"; while ( ) { print; } close TEST;