/usr/ is in ruby-timers 4.1.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/timers-4.1.1.gemspec
/usr/share/doc/
/usr/share/doc/ruby-timers/
/usr/share/doc/ruby-timers/copyright
/usr/share/doc/ruby-timers/README.md
/usr/share/doc/ruby-timers/changelog.Debian.gz
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/timers.rb
/usr/lib/ruby/vendor_ruby/timers/
/usr/lib/ruby/vendor_ruby/timers/timer.rb
/usr/lib/ruby/vendor_ruby/timers/group.rb
/usr/lib/ruby/vendor_ruby/timers/events.rb
/usr/lib/ruby/vendor_ruby/timers/wait.rb
/usr/lib/ruby/vendor_ruby/timers/version.rb