/usr/lib/ruby/vendor_ruby/ is in ruby-dnsruby 1.53-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/dnsruby.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/
/usr/lib/ruby/vendor_ruby/Dnsruby/zone_transfer.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/zone_reader.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/dnssec.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/Cache.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/message.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/ipv4.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/TheLog.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/DNS.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/Recursor.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/Resolver.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/Config.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/SingleResolver.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/key_cache.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/validator_thread.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/select_thread.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/name.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/AFSDB.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/resource.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/MX.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/DS.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/SPF.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/NSEC3.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/HIP.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/PX.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/X25.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/AAAA.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/SOA.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/DNSKEY.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/IPSECKEY.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/KX.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/HINFO.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/RRSIG.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/DHCID.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/IN.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/NSEC.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/TXT.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/NAPTR.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/RP.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/TKEY.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/CERT.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/DLV.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/SRV.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/LOC.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/A.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/ISDN.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/SSHFP.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/OPT.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/RT.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/NSEC3PARAM.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/MINFO.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/TSIG.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/NSAP.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/domain_name.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/resource/generic.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/ipv6.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/PacketSender.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/code_mapper.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/update.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/single_verifier.rb
/usr/lib/ruby/vendor_ruby/Dnsruby/Hosts.rb