Tools:
Rake - Create/migrate database, clear web session data.
WEBrick - Web server for hosting Rails web applications.
SQLite - A simple database system.
Rack Middleware - Standardized interface for interaction between web server and web application.
rails new hello_www
cd hello_www
rails server (start a web server)
Under hello_www (Rails root):
app: models, views, and controllers code
bin: helper scripts (bundle, rails, rake)
config: App, database and route configuration
db: database schema and migrations
Gemfile: specify the required gems
lib:
log: application logging directory
pulic: webroot of the application
test: Tests - Agile development
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