Gem

• gem --help

gem install bundler
gem install rollbar

gem environment
gem environment gemdir

Related terms

• gemfile

See also

• RubyGems, gem, gemfile, .gemspecs, gem install, gem environment, gem --help
• Ruby, Sinatra, Ruby on rails, RubyGems, gem, bundle, Rack, Gemfile, Keg-only, brew install ruby@2.7, bundle, JRuby, CocoaPods, apt install ruby, Fog, Puma