/usr/ is in ruby-bson 1.10.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/bson-1.10.0.gemspec
/usr/share/doc/
/usr/share/doc/ruby-bson/
/usr/share/doc/ruby-bson/examples/
/usr/share/doc/ruby-bson/examples/b2json
/usr/share/doc/ruby-bson/examples/j2bson
/usr/share/doc/ruby-bson/copyright
/usr/share/doc/ruby-bson/changelog.Debian.gz
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/bson/
/usr/lib/ruby/vendor_ruby/bson/ordered_hash.rb
/usr/lib/ruby/vendor_ruby/bson/support/
/usr/lib/ruby/vendor_ruby/bson/support/hash_with_indifferent_access.rb
/usr/lib/ruby/vendor_ruby/bson/types/
/usr/lib/ruby/vendor_ruby/bson/types/code.rb
/usr/lib/ruby/vendor_ruby/bson/types/regex.rb
/usr/lib/ruby/vendor_ruby/bson/types/dbref.rb
/usr/lib/ruby/vendor_ruby/bson/types/min_max_keys.rb
/usr/lib/ruby/vendor_ruby/bson/types/timestamp.rb
/usr/lib/ruby/vendor_ruby/bson/types/object_id.rb
/usr/lib/ruby/vendor_ruby/bson/types/binary.rb
/usr/lib/ruby/vendor_ruby/bson/exceptions.rb
/usr/lib/ruby/vendor_ruby/bson/bson_ruby.rb
/usr/lib/ruby/vendor_ruby/bson/grow.rb
/usr/lib/ruby/vendor_ruby/bson/bson_c.rb
/usr/lib/ruby/vendor_ruby/bson/bson_java.rb
/usr/lib/ruby/vendor_ruby/bson/byte_buffer.rb
/usr/lib/ruby/vendor_ruby/bson.rb