Comments about running bootstrap_ruby.sh in a new installtion of Ubuntu 9.04 on a VMware guest.

The first lines of the script that start with sudo aptitude ... result in messages that say update, build-essential, etc are not found.
Manually entering sudo aptitude update, sudo aptitude install build-essential result in similar errors

Entering sudo apt-get update, sudo apt-get install build-essential, etc. one line at a time manually does not cause errors.