I'm inside of the terminal right now and just about to make a new application. I'm inside of the app folder, did `rails new --help` and pops up:

```
The program 'rails' can be found in the following packages:
 * rails
 * ruby-railties-3.2
Try: sudo apt-get install <selected package>

```

and this couldn't be right because I installed rails using these instructions and everything is the latest and up to date: 

<http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/>

Why am I getting this prompt? What do I have to do to get Rails working?