gemファイルのインストール場所を調べたりする方法

$ gem environment を使うとOK

ironsand@osx gem environment

RubyGems Environment:
- RUBYGEMS VERSION: 2.0.3
- RUBY VERSION: 2.0.0 (2013-06-27 patchlevel 247) [x86_64-darwin11.4.2]
- INSTALLATION DIRECTORY: /Users/ironsand/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0
- RUBY EXECUTABLE: /Users/ironsand/.rbenv/versions/2.0.0-p247/bin/ruby
- EXECUTABLE DIRECTORY: /Users/ironsand/.rbenv/versions/2.0.0-p247/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86_64-darwin-11
- GEM PATHS:
- /Users/ironsand/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0
- /Users/ironsand/.gem/ruby/2.0.0
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :backtrace => false
- :bulk_threshold => 1000
- "install" => "--no-ri --no-rdoc"
- "update" => "--no-ri --no-rdoc"
- REMOTE SOURCES:
- https://rubygems.org/

あと $ gem help commands すると色々教えてもらえて便利!


参考

ruby - How can I find where gem files are installed? - Stack Overflow

http://stackoverflow.com/questions/19072070/how-can-i-find-where-gem-files-are-installed/19072136?noredirect=1#19072136