/usr/ is in ruby-mixlib-config 2.1.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/mixlib/
/usr/lib/ruby/vendor_ruby/mixlib/config.rb
/usr/lib/ruby/vendor_ruby/mixlib/config/
/usr/lib/ruby/vendor_ruby/mixlib/config/version.rb
/usr/lib/ruby/vendor_ruby/mixlib/config/configurable.rb
/usr/lib/ruby/vendor_ruby/mixlib/config/reopened_configurable_with_config_context_error.rb
/usr/lib/ruby/vendor_ruby/mixlib/config/reopened_config_context_with_configurable_error.rb
/usr/lib/ruby/vendor_ruby/mixlib/config/unknown_config_option_error.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/mixlib-config-2.1.0.gemspec
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/mixlib-config-2.1.0.gemspec
/usr/share/doc/
/usr/share/doc/ruby-mixlib-config/
/usr/share/doc/ruby-mixlib-config/changelog.Debian.gz
/usr/share/doc/ruby-mixlib-config/README.md.gz
/usr/share/doc/ruby-mixlib-config/copyright