Computer Science Programming Basics in Ruby (2013)
Appendix B. Installing Ruby
This book uses the Ruby programming language to demonstrate code. It is expected that the student learn how to develop programs in Ruby. To accomplish such, the Ruby language must be installed.
To install Ruby on your computer, follow the instructions that correspond to your operating system (Windows, Mac, or Linux).
1. Open a web browser and go to the Ruby Installer.
2. Click the Download button on the main page.
3. Click the top file under RubyInstallers and save the file to the desktop.
4. Double-click the file on the desktop and follow the instructions to install Ruby. irb will automatically be installed with the package, as will the rdocs.
Debian/Ubuntu: $ sudo apt-get install ruby1.9.1-full
Gentoo: $ emerge ruby irb rdoc
Slackware: Download the source code and follow the instructions in the tar.gz file.
B.3 Mac OS X
Ruby is installed by default in Mac OS X. However, we recommend that you update to a later version of Ruby 1.9 by using the One-Click install.