/usr/ is in ruby-httpclient 2.8.3-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/bin/
/usr/bin/httpclient
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/hexdump.rb
/usr/lib/ruby/vendor_ruby/http-access2/
/usr/lib/ruby/vendor_ruby/http-access2/cookie.rb
/usr/lib/ruby/vendor_ruby/http-access2/http.rb
/usr/lib/ruby/vendor_ruby/http-access2.rb
/usr/lib/ruby/vendor_ruby/httpclient/
/usr/lib/ruby/vendor_ruby/httpclient/auth.rb
/usr/lib/ruby/vendor_ruby/httpclient/cacert.pem
/usr/lib/ruby/vendor_ruby/httpclient/cacert1024.pem
/usr/lib/ruby/vendor_ruby/httpclient/connection.rb
/usr/lib/ruby/vendor_ruby/httpclient/cookie.rb
/usr/lib/ruby/vendor_ruby/httpclient/http.rb
/usr/share/doc/ruby-httpclient/examples/
/usr/lib/ruby/vendor_ruby/httpclient/include_client.rb
/usr/lib/ruby/vendor_ruby/httpclient/jruby_ssl_socket.rb
/usr/lib/ruby/vendor_ruby/httpclient/session.rb
/usr/lib/ruby/vendor_ruby/httpclient/ssl_config.rb
/usr/lib/ruby/vendor_ruby/httpclient/ssl_socket.rb
/usr/lib/ruby/vendor_ruby/httpclient/timeout.rb
/usr/lib/ruby/vendor_ruby/httpclient/util.rb
/usr/lib/ruby/vendor_ruby/httpclient/version.rb
/usr/lib/ruby/vendor_ruby/httpclient/webagent-cookie.rb
/usr/lib/ruby/vendor_ruby/httpclient.rb
/usr/lib/ruby/vendor_ruby/jsonclient.rb
/usr/lib/ruby/vendor_ruby/oauthclient.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-httpclient/
/usr/share/doc/ruby-httpclient/README.md
/usr/share/doc/ruby-httpclient/changelog.Debian.gz
/usr/share/doc/ruby-httpclient/copyright
/usr/share/doc/ruby-httpclient/examples/async.rb
/usr/share/doc/ruby-httpclient/examples/auth.rb
/usr/share/doc/ruby-httpclient/examples/cookie.rb
/usr/share/doc/ruby-httpclient/examples/dav.rb
/usr/share/doc/ruby-httpclient/examples/howto.rb
/usr/share/doc/ruby-httpclient/examples/jsonclient.rb
/usr/share/doc/ruby-httpclient/examples/oauth_buzz.rb
/usr/share/doc/ruby-httpclient/examples/oauth_friendfeed.rb
/usr/share/doc/ruby-httpclient/examples/oauth_twitter.rb
/usr/share/doc/ruby-httpclient/examples/ssl/
/usr/share/doc/ruby-httpclient/examples/ssl/0cert.pem
/usr/share/doc/ruby-httpclient/examples/ssl/0key.pem
/usr/share/doc/ruby-httpclient/examples/ssl/1000cert.pem
/usr/share/doc/ruby-httpclient/examples/ssl/1000key.pem
/usr/share/doc/ruby-httpclient/examples/ssl/htdocs/
/usr/share/doc/ruby-httpclient/examples/ssl/htdocs/index.html
/usr/share/doc/ruby-httpclient/examples/ssl/ssl_client.rb
/usr/share/doc/ruby-httpclient/examples/ssl/webrick_httpsd.rb
/usr/share/doc/ruby-httpclient/examples/stream.rb
/usr/share/doc/ruby-httpclient/examples/thread.rb
/usr/share/doc/ruby-httpclient/examples/wcat.rb
/usr/share/man/
/usr/share/man/man1/
/usr/share/man/man1/httpclient.1.gz
/usr/share/man/man1/jsonclient.1.gz
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/httpclient-2.8.3.gemspec