for I in {00..19};
do wget http://s3.amazonaws.com/bearwithclaws.baconfile.com/hackermo... ;
done
do wget http://s3.amazonaws.com/bearwithclaws.baconfile.com/hackermo... ;
done
wget http://s3.amazonaws.com/bearwithclaws.baconfile.com/hackermonthly-issue0{0..1}{0..9}.zip
Using "{0..1}{0..9}" instead of bash 4's zero-padding brace expansion.