/usr/ is in ruby-omniauth-remote-user 0.1.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/omniauth/
/usr/lib/ruby/vendor_ruby/omniauth/remote-user.rb
/usr/lib/ruby/vendor_ruby/omniauth/strategies/
/usr/lib/ruby/vendor_ruby/omniauth/strategies/remote_user.rb
/usr/lib/ruby/vendor_ruby/omniauth-remote-user.rb
/usr/lib/ruby/vendor_ruby/omniauth-remote-user/
/usr/lib/ruby/vendor_ruby/omniauth-remote-user/version.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/omniauth-remote-user-0.1.3.gemspec
/usr/share/doc/
/usr/share/doc/ruby-omniauth-remote-user/
/usr/share/doc/ruby-omniauth-remote-user/copyright
/usr/share/doc/ruby-omniauth-remote-user/changelog.Debian.gz