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/startup-class/dotfiles.git ln -sb dotfiles/.screenrc . ln -sb dotfiles/.bash_profile . ln -sb dotfiles/.bashrc . ln -sb dotfiles/.bashrc_custom . mv .emacs.d .emacs.d~ ln -s dotfiles/.emacs.d .

See also http://github.com/startup-class/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. See the Startup Engineering Video Lectures 4a/4b for more details.