/usr/ is in ruby-guard-shell 0.7.1-1.
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/guard/
/usr/lib/ruby/vendor_ruby/guard/shell/
/usr/lib/ruby/vendor_ruby/guard/shell/templates/
/usr/lib/ruby/vendor_ruby/guard/shell/templates/Guardfile
/usr/lib/ruby/vendor_ruby/guard/shell/version.rb
/usr/lib/ruby/vendor_ruby/guard/shell.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-guard-shell/
/usr/share/doc/ruby-guard-shell/changelog.Debian.gz
/usr/share/doc/ruby-guard-shell/copyright
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/guard-shell-0.7.1.gemspec