/usr/ is in ruby-pcap 0.7.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/ruby-pcap/doc-ja/
/usr/share/doc/ruby-pcap/changelog.Debian.gz
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-pcap/
/usr/share/doc/ruby-pcap/doc/
/usr/share/doc/ruby-pcap/doc/Capture.html
/usr/share/doc/ruby-pcap/doc/ICMPPacket.html
/usr/share/doc/ruby-pcap/doc/TruncatedPacket.html
/usr/share/doc/ruby-pcap/doc/Packet.html
/usr/share/doc/ruby-pcap/doc/Pcap.html
/usr/share/doc/ruby-pcap/doc/Dumper.html
/usr/share/doc/ruby-pcap/doc/PcapError.html
/usr/share/doc/ruby-pcap/doc/Filter.html
/usr/share/doc/ruby-pcap/doc/Pcaplet.html
/usr/share/doc/ruby-pcap/doc/TCPPacket.html
/usr/share/doc/ruby-pcap/doc/IPAddress.html
/usr/share/doc/ruby-pcap/doc/IPPacket.html
/usr/share/doc/ruby-pcap/doc/index.html
/usr/share/doc/ruby-pcap/doc/UDPPacket.html
/usr/share/doc/ruby-pcap/examples/
/usr/share/doc/ruby-pcap/examples/httpdump.rb
/usr/share/doc/ruby-pcap/examples/test.rb
/usr/share/doc/ruby-pcap/examples/tcpdump.rb
/usr/share/doc/ruby-pcap/copyright
/usr/share/doc/ruby-pcap/README.ja
/usr/share/doc/ruby-pcap/README
/usr/share/doc/ruby-pcap/doc-ja/Capture.html
/usr/share/doc/ruby-pcap/doc-ja/ICMPPacket.html
/usr/share/doc/ruby-pcap/doc-ja/TruncatedPacket.html
/usr/share/doc/ruby-pcap/doc-ja/Packet.html
/usr/share/doc/ruby-pcap/doc-ja/Pcap.html
/usr/share/doc/ruby-pcap/doc-ja/Dumper.html
/usr/share/doc/ruby-pcap/doc-ja/PcapError.html
/usr/share/doc/ruby-pcap/doc-ja/Filter.html
/usr/share/doc/ruby-pcap/doc-ja/Pcaplet.html
/usr/share/doc/ruby-pcap/doc-ja/TCPPacket.html
/usr/share/doc/ruby-pcap/doc-ja/IPAddress.html
/usr/share/doc/ruby-pcap/doc-ja/IPPacket.html
/usr/share/doc/ruby-pcap/doc-ja/index.html
/usr/share/doc/ruby-pcap/doc-ja/UDPPacket.html
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/1.8/
/usr/lib/ruby/vendor_ruby/1.8/x86_64-linux/
/usr/lib/ruby/vendor_ruby/1.8/x86_64-linux/pcap.so
/usr/lib/ruby/vendor_ruby/pcap_misc.rb
/usr/lib/ruby/vendor_ruby/pcaplet.rb