Tab Completion and Syntax coloring for irb Ruby Interpreter Wirble is a Ruby Gem that provides Tab-Completion and syntax coloring for the Ruby interpreter, irb . In this article well see how to install it and configure it. irb with Tab-Completion and Syntax coloring Install Open a terminal window and run: sudo gem install wirble && echo -n "require rubygems require wirble Wirble.init Wirble.colorize" >> ~/.irbrc Usage Now that Wirble is installed and irbrc is properly configured, (re)open irb and then you can start using the "TAB" key to auto-complete while typing a Ruby instruction. Only the results will be colorized, not the instructions typed. References Wirble: Tab-Completion and Syntax Coloring for irb | Ruby Inside download file now