/usr/ is in ruby-grib 0.2.2-3+b5.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/ruby/
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-grib/
/usr/share/doc/ruby-grib/changelog.Debian.gz
/usr/share/doc/ruby-grib/changelog.Debian.amd64.gz
/usr/share/doc/ruby-grib/copyright
/usr/share/doc/ruby-grib/README.rdoc
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/2.1/
/usr/share/rubygems-integration/2.1/specifications/
/usr/share/rubygems-integration/2.1/specifications/rb-grib-0.2.2.gemspec
/usr/lib/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.1.0/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.1.0/numru/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.1.0/numru/grib.so
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/numru/
/usr/lib/ruby/vendor_ruby/numru/grib/
/usr/lib/ruby/vendor_ruby/numru/grib/version.rb
/usr/lib/ruby/vendor_ruby/numru/grib/setenv.rb
/usr/lib/ruby/vendor_ruby/numru/grib/grib.rb
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib2/
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib2/localConcepts/
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib2/localConcepts/rjtd/
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/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib2/localConcepts/rjtd/paramId.def
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib2/localConcepts/rjtd/shortName.def
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib2/localConcepts/rjtd/units.def
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib1/
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib1/localConcepts/
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib1/localConcepts/kwbc/
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/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib1/localConcepts/kwbc/paramId.def
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib1/localConcepts/kwbc/shortName.def
/usr/lib/ruby/vendor_ruby/numru/grib/definitions/grib1/localConcepts/kwbc/units.def
/usr/lib/ruby/vendor_ruby/numru/grib.rb