Pry is a powerful alternative to the standard IRB shell for Ruby. It features syntax highlighting, a flexible plugin architecture, runtime invocation and source and documentation browsing. Quickstart Install Pry: $ gem install pry $ pry Try it out: (Displaying source for FileUtils.rm) pry(main)> cd FileUtils pry(FileUtils):1> show-method rm From: /opt/ruby/lib/ruby/1.9.1/fileutils.rb @ line 556: N