gem install bundler
gem install rollbar
gem --help
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
