git clone git://github.com/jrallison/dotfiles ~/.dotfiles
cd ~/.dotfiles
git submodule init
git submodule update
rake install
I am running on Mac OS X, but it will likely work on Linux as well with minor fiddling. I primarily use zsh, but this includes some older bash files as well. If you would like to switch to zsh, you can do so with the following command.
chsh -s /bin/zsh