/usr/ is in ruby-tokyocabinet 1.31-5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/tokyocabinet.so
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/2.3.0/
/usr/share/rubygems-integration/2.3.0/specifications/
/usr/share/rubygems-integration/2.3.0/specifications/tokyocabinet-1.31.gemspec
/usr/share/doc/
/usr/share/doc/ruby-tokyocabinet/
/usr/share/doc/ruby-tokyocabinet/examples/
/usr/share/doc/ruby-tokyocabinet/examples/example/
/usr/share/doc/ruby-tokyocabinet/examples/example/tcadbex.rb
/usr/share/doc/ruby-tokyocabinet/examples/example/tctdbex.rb
/usr/share/doc/ruby-tokyocabinet/examples/example/tchdbex.rb
/usr/share/doc/ruby-tokyocabinet/examples/example/tcbdbex.rb
/usr/share/doc/ruby-tokyocabinet/examples/example/tcfdbex.rb
/usr/share/doc/ruby-tokyocabinet/copyright
/usr/share/doc/ruby-tokyocabinet/changelog.Debian.gz