Clone and run this on a new EC2 instance running Ubuntu 12.04.2 LTS to configure your bash and emacs development environment as follows:

cd $HOME
git clone https://github.com/rmaskaron/dotfiles.git
./dotfiles/setup.sh

See also http://github.com/rmaskaron/setup to install prerequisite programs. If all goes well, in addition to a more useful prompt, now you can do emacs -nw hello.js and hitting C-c! to launch an interactive SSJS REPL, among many other features.