michele@echo:~ % gem env                                                     [11:39PM]
RubyGems Environment:
  - RUBYGEMS VERSION: 1.8.28
  - RUBY VERSION: 1.9.3 (2013-11-22 patchlevel 484) [x86_64-linux]
  - INSTALLATION DIRECTORY: /var/lib/gems/1.9.1
  - RUBY EXECUTABLE: /usr/bin/ruby1.9.1
  - EXECUTABLE DIRECTORY: /usr/local/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /var/lib/gems/1.9.1
     - /home/michele/.gem/ruby/1.9.1
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://rubygems.org/
michele@echo:~ % ruby -v                                                     [11:42PM]
ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-linux-gnu]