/usr/ is in libnet-irc-ruby 0.14-5.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/libnet-irc-ruby/
/usr/share/doc/libnet-irc-ruby/LICENSE.ja
/usr/share/doc/libnet-irc-ruby/README
/usr/share/doc/libnet-irc-ruby/README.ja
/usr/share/doc/libnet-irc-ruby/NEWS.gz
/usr/share/doc/libnet-irc-ruby/BUGS
/usr/share/doc/libnet-irc-ruby/doc-ja/
/usr/share/doc/libnet-irc-ruby/doc-ja/irc-lib.txt
/usr/share/doc/libnet-irc-ruby/doc-ja/irc-lib-api.txt
/usr/share/doc/libnet-irc-ruby/doc-ja/index.html
/usr/share/doc/libnet-irc-ruby/doc-ja/irc-client.txt
/usr/share/doc/libnet-irc-ruby/doc-ja/irc-client-api.txt
/usr/share/doc/libnet-irc-ruby/AUTHORS
/usr/share/doc/libnet-irc-ruby/copyright
/usr/share/doc/libnet-irc-ruby/TODO
/usr/share/doc/libnet-irc-ruby/changelog.Debian.gz
/usr/share/doc/libnet-irc-ruby/README.Debian
/usr/share/doc/libnet-irc-ruby/examples/
/usr/share/doc/libnet-irc-ruby/examples/bot.rb
/usr/share/doc/libnet-irc-ruby/examples/cpi/
/usr/share/doc/libnet-irc-ruby/examples/cpi/syslog.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi/operator.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi/omikuji.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi/userlog.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi/dice.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi/init.cpi
/usr/share/doc/libnet-irc-ruby/examples/bot.ja.rb
/usr/share/doc/libnet-irc-ruby/examples/cpi.ja/
/usr/share/doc/libnet-irc-ruby/examples/cpi.ja/syslog.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi.ja/operator.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi.ja/omikuji.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi.ja/userlog.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi.ja/dice.cpi
/usr/share/doc/libnet-irc-ruby/examples/cpi.ja/init.cpi
/usr/share/doc/libnet-irc-ruby/MEMO.ja
/usr/share/lintian/
/usr/share/lintian/overrides/
/usr/share/lintian/overrides/libnet-irc-ruby
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/1.8/
/usr/lib/ruby/1.8/irc/
/usr/lib/ruby/1.8/irc/irc.rb
/usr/lib/ruby/1.8/irc/const.rb
/usr/lib/ruby/1.8/irc/client.rb
/usr/lib/ruby/1.8/irc/agent.rb
/usr/lib/ruby/1.8/localize.rb