I recently tried to install CoffeeScript on my mac and now am unable to use even the most basic of commands like ls, cd and so on. Something tells me that it's because the $PATH variable has changed. I remember having to do that when I tried to make the installation. I tried following the instructions found here, but it doesn't work because the vi command isn't found.
Upon entering echo $PATH in the terminal, it reads /usr/local/bin: