Here's a Perl 1 liner to get the numbers 1 to 100 in a random sequence:

perl -MLWP::Simple -e "getprint('http://www.random.org/cgi-bin/randseq
+?min=1&max=100')";
[download]

The nice folks at random.org won't give you 100000-999999 for free but it's a start.