/usr/ is in ruby-childprocess 0.5.9-1ubuntu1.
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/usr/lib/ruby/vendor_ruby/childprocess/unix/
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/childprocess/
/usr/lib/ruby/vendor_ruby/childprocess/tools/
/usr/lib/ruby/vendor_ruby/childprocess/tools/generator.rb
/usr/lib/ruby/vendor_ruby/childprocess/windows.rb
/usr/lib/ruby/vendor_ruby/childprocess/abstract_process.rb
/usr/lib/ruby/vendor_ruby/childprocess/abstract_io.rb
/usr/lib/ruby/vendor_ruby/childprocess/jruby.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/posix_spawn_process.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/platform/
/usr/lib/ruby/vendor_ruby/childprocess/unix/platform/x86_64-linux.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/platform/i386-linux.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/platform/i386-solaris.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/platform/x86_64-macosx.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/fork_exec_process.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/lib.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/process.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix/io.rb
/usr/lib/ruby/vendor_ruby/childprocess/errors.rb
/usr/lib/ruby/vendor_ruby/childprocess/jruby/
/usr/lib/ruby/vendor_ruby/childprocess/jruby/pump.rb
/usr/lib/ruby/vendor_ruby/childprocess/jruby/process.rb
/usr/lib/ruby/vendor_ruby/childprocess/jruby/io.rb
/usr/lib/ruby/vendor_ruby/childprocess/unix.rb
/usr/lib/ruby/vendor_ruby/childprocess/windows/
/usr/lib/ruby/vendor_ruby/childprocess/windows/handle.rb
/usr/lib/ruby/vendor_ruby/childprocess/windows/structs.rb
/usr/lib/ruby/vendor_ruby/childprocess/windows/lib.rb
/usr/lib/ruby/vendor_ruby/childprocess/windows/process.rb
/usr/lib/ruby/vendor_ruby/childprocess/windows/process_builder.rb
/usr/lib/ruby/vendor_ruby/childprocess/windows/io.rb
/usr/lib/ruby/vendor_ruby/childprocess/version.rb
/usr/lib/ruby/vendor_ruby/childprocess.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/childprocess-0.5.9.gemspec
/usr/share/doc/
/usr/share/doc/ruby-childprocess/
/usr/share/doc/ruby-childprocess/copyright
/usr/share/doc/ruby-childprocess/changelog.Debian.gz
/usr/share/doc/ruby-childprocess/README.md.gz