What is “rbenv-whatis” Package?

Resolves abbreviations and aliases to Ruby versions
For more details: https://github.com/rkh/rbenv-whatis

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install rbenv-whatis.

  brew install rbenv-whatis

Now, use rbenv-whatis!