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Ruby Gems

sudo gem install sinatra

Your first Sinatra app

require "rubygems" 
require "sinatra" 

get '/' do
    "Hello World" 
end

now:

ruby myapp.rb

then: ..

http://localhost:4567

Bleeding Edge

1. cd where/you/keep/your/projects
2. git clone git://github.com/bmizerany/sinatra.git
3. cd your_project
4. ln -s ../sinatra
5. git submodule init && git submodule update
6. rake test

at the top of your sinatra.rb file

$:.unshift File.dirname(__FILE__) + '/sinatra/lib'
require 'sinatra'

get '/about' do
  "All good in the hood" 
end