/usr/lib/ruby/vendor_ruby/ is in capistrano 3.4.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/capistrano/
/usr/lib/ruby/vendor_ruby/capistrano/git.rb
/usr/lib/ruby/vendor_ruby/capistrano/tasks/
/usr/lib/ruby/vendor_ruby/capistrano/tasks/install.rake
/usr/lib/ruby/vendor_ruby/capistrano/tasks/deploy.rake
/usr/lib/ruby/vendor_ruby/capistrano/tasks/console.rake
/usr/lib/ruby/vendor_ruby/capistrano/tasks/svn.rake
/usr/lib/ruby/vendor_ruby/capistrano/tasks/hg.rake
/usr/lib/ruby/vendor_ruby/capistrano/tasks/git.rake
/usr/lib/ruby/vendor_ruby/capistrano/tasks/framework.rake
/usr/lib/ruby/vendor_ruby/capistrano/upload_task.rb
/usr/lib/ruby/vendor_ruby/capistrano/templates/
/usr/lib/ruby/vendor_ruby/capistrano/templates/deploy.rb.erb
/usr/lib/ruby/vendor_ruby/capistrano/templates/Capfile
/usr/lib/ruby/vendor_ruby/capistrano/templates/stage.rb.erb
/usr/lib/ruby/vendor_ruby/capistrano/setup.rb
/usr/lib/ruby/vendor_ruby/capistrano/console.rb
/usr/lib/ruby/vendor_ruby/capistrano/install.rb
/usr/lib/ruby/vendor_ruby/capistrano/svn.rb
/usr/lib/ruby/vendor_ruby/capistrano/deploy.rb
/usr/lib/ruby/vendor_ruby/capistrano/version_validator.rb
/usr/lib/ruby/vendor_ruby/capistrano/i18n.rb
/usr/lib/ruby/vendor_ruby/capistrano/configuration.rb
/usr/lib/ruby/vendor_ruby/capistrano/application.rb
/usr/lib/ruby/vendor_ruby/capistrano/dsl/
/usr/lib/ruby/vendor_ruby/capistrano/dsl/paths.rb
/usr/lib/ruby/vendor_ruby/capistrano/dsl/stages.rb
/usr/lib/ruby/vendor_ruby/capistrano/dsl/env.rb
/usr/lib/ruby/vendor_ruby/capistrano/dsl/task_enhancements.rb
/usr/lib/ruby/vendor_ruby/capistrano/framework.rb
/usr/lib/ruby/vendor_ruby/capistrano/configuration/
/usr/lib/ruby/vendor_ruby/capistrano/configuration/server.rb
/usr/lib/ruby/vendor_ruby/capistrano/configuration/filter.rb
/usr/lib/ruby/vendor_ruby/capistrano/configuration/servers.rb
/usr/lib/ruby/vendor_ruby/capistrano/configuration/question.rb
/usr/lib/ruby/vendor_ruby/capistrano/dotfile.rb
/usr/lib/ruby/vendor_ruby/capistrano/hg.rb
/usr/lib/ruby/vendor_ruby/capistrano/all.rb
/usr/lib/ruby/vendor_ruby/capistrano/version.rb
/usr/lib/ruby/vendor_ruby/capistrano/scm.rb
/usr/lib/ruby/vendor_ruby/capistrano/dsl.rb
/usr/lib/ruby/vendor_ruby/capistrano/defaults.rb
/usr/lib/ruby/vendor_ruby/capistrano.rb