#!/usr/bin/perl -wl

    use strict;

    my @ints = (34, 0, 6, 9999, 1);

    print "@ints";

    @ints = map {pack   "n", $_ } @ints; # Pack the data
    @ints = sort @ints;                  # Sort lexically
    @ints = map {unpack "n", $_ } @ints; # Unpack it

    print "@ints";
[download]

However, there are quite a few caveats, such as dealing with negative numbers and hardware endianness. But, perhaps you could give a bit more detail about what you are trying to do before we go down those paths.

--
John.

There is a sequential binary file, with 150 lines and 100 fields in each row. There are two fields required one (a) is eight bytes and appears four bytes in, the other one (b) is four bytes on from (a) and is four bytes long. I am not scared of it, I just don't know how to make it do what I want it to do

Check out File::Binary.