RoR Guides used Textile, anybody knows how to use it?

It’s said in the RoR Guides that it was written in Textile, a lightweight markup language.

How does one use it and then come up something like that of the RoR Guides? Do you need to have a generator so that it can generate the HTML files for the Textile markup that you’ve used?

Elmer A. Sia wrote in post #1091187:

It's
said<http://guides.rubyonrails.org/ruby_on_rails_guides_guidelines.html>in
the RoR
Guides <http://guides.rubyonrails.org/index.html> that it was written in
Textile, a lightweight markup language.

How does one use it and then come up something like that of the RoR
Guides?
Do you need to have a generator so that it can generate the HTML files
for
the Textile markup that you've used?

Take a look at RedCloth for answers to all your questions:

http://redcloth.org/textile