Ruby Docs Ruby language [Rails] (http://rubyonrails.org/) Rails guide Ruby Gems One Click Rails on Digital Ocean Installing Rails on Ubuntu 14.04 Reddit Tutorials Point Stack overflow Some Reading materal Beginning Ruby: From Novice to Professional Ruby on Rails 4.0 Guide Ruby in a Nutshell Command Line Skillz Rails Slack Channel
Install
Ruby Version Manager or Rbenv or ruby-install + chruby
Bundler dependency manager
Homebrew package manager for Mac OS X
Learn
Learn to Program in Ruby (online tutorial)
Learn Ruby the Hard Way (free online book)
Learn Web Development with Rails (free online book)
Ruby Koans (a path to enlightenment)
Practice and Share
Exercism.io: Crowdsourced Mentorship
Consult
Ruby on Rails API Reference
The Ruby Toolbox
Community-driven style guides for Ruby and Rails
Grow
Railscasts (video series)
Ruby Rogues (podcast)
Eloquent Ruby (book)
Practical Object-Oriented Design in Ruby (book)
Adventure
The Rails source code.