/usr/lib/ruby/1.8/facter/util/ is in facter 1.6.5-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/1.8/facter/util/collection.rb
/usr/lib/ruby/1.8/facter/util/config.rb
/usr/lib/ruby/1.8/facter/util/confine.rb
/usr/lib/ruby/1.8/facter/util/ec2.rb
/usr/lib/ruby/1.8/facter/util/fact.rb
/usr/lib/ruby/1.8/facter/util/ip.rb
/usr/lib/ruby/1.8/facter/util/loader.rb
/usr/lib/ruby/1.8/facter/util/macaddress.rb
/usr/lib/ruby/1.8/facter/util/macosx.rb
/usr/lib/ruby/1.8/facter/util/manufacturer.rb
/usr/lib/ruby/1.8/facter/util/memory.rb
/usr/lib/ruby/1.8/facter/util/monkey_patches.rb
/usr/lib/ruby/1.8/facter/util/netmask.rb
/usr/lib/ruby/1.8/facter/util/plist/
/usr/lib/ruby/1.8/facter/util/plist.rb
/usr/lib/ruby/1.8/facter/util/plist/generator.rb
/usr/lib/ruby/1.8/facter/util/plist/parser.rb
/usr/lib/ruby/1.8/facter/util/processor.rb
/usr/lib/ruby/1.8/facter/util/resolution.rb
/usr/lib/ruby/1.8/facter/util/uptime.rb
/usr/lib/ruby/1.8/facter/util/values.rb
/usr/lib/ruby/1.8/facter/util/virtual.rb
/usr/lib/ruby/1.8/facter/util/vlans.rb
/usr/lib/ruby/1.8/facter/util/wmi.rb
/usr/lib/ruby/1.8/facter/util/xendomains.rb