/usr/lib/ruby/ is in ruby-packetfu 1.1.8-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/packetfu.rb
/usr/lib/ruby/vendor_ruby/packetfu/
/usr/lib/ruby/vendor_ruby/packetfu/utils.rb
/usr/lib/ruby/vendor_ruby/packetfu/config.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/
/usr/lib/ruby/vendor_ruby/packetfu/protos/lldp/
/usr/lib/ruby/vendor_ruby/packetfu/protos/lldp/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/lldp/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/ip/
/usr/lib/ruby/vendor_ruby/packetfu/protos/ip/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/ip/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/eth.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/ip.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/icmp.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/arp/
/usr/lib/ruby/vendor_ruby/packetfu/protos/arp/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/arp/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/ipv6.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/eth/
/usr/lib/ruby/vendor_ruby/packetfu/protos/eth/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/eth/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/invalid.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/lldp.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/udp/
/usr/lib/ruby/vendor_ruby/packetfu/protos/udp/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/udp/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/options.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/option.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/flags.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/ecn.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/reserved.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/tcp/hlen.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/hsrp.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/hsrp/
/usr/lib/ruby/vendor_ruby/packetfu/protos/hsrp/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/hsrp/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/arp.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/icmp/
/usr/lib/ruby/vendor_ruby/packetfu/protos/icmp/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/icmp/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/udp.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/ipv6/
/usr/lib/ruby/vendor_ruby/packetfu/protos/ipv6/mixin.rb
/usr/lib/ruby/vendor_ruby/packetfu/protos/ipv6/header.rb
/usr/lib/ruby/vendor_ruby/packetfu/capture.rb
/usr/lib/ruby/vendor_ruby/packetfu/structfu.rb
/usr/lib/ruby/vendor_ruby/packetfu/pcap.rb
/usr/lib/ruby/vendor_ruby/packetfu/inject.rb
/usr/lib/ruby/vendor_ruby/packetfu/packet.rb
/usr/lib/ruby/vendor_ruby/packetfu/version.rb