Ruby gem – handy reference

Ruby gem is a package manager for the Ruby programming language. Here are some gem handy commands on Mac or Linux.

1. Install a package

   $ sudo gem install rails
   

2. Uninstall a package

   $ sudo gem uninstall rails
   

3. List installed packages

   $ gem list
   

4. Show contents of an installed package

   $ gem contents rails
   

5. List commands and get help for a command

   $ gem help commands
   $ gem help list
   

6. Search remote gems by regex

   $ gem search sass
   

7. Find the location of a library file you can require

   $ gem which sass