To Install Rails Gem on JRuby

If you installed your JRuby as a standalone instance, you also need to install the required Rails and other Gems on it. To install Rails, use the following procedure.

1. Install the Rails Gem:

   jruby —S gem install rails

   The -S parameter that you used to run the command to install Rails tells JRuby to look for the script anywhere in the JRUBY_HOME path. With this command, JRuby and required Gems are installed on JRuby.