/usr/ is in ruby-dotenv 0.9.0-1.
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/dotenv.rb
/usr/lib/ruby/vendor_ruby/dotenv/
/usr/lib/ruby/vendor_ruby/dotenv/capistrano.rb
/usr/lib/ruby/vendor_ruby/dotenv/tasks.rb
/usr/lib/ruby/vendor_ruby/dotenv/capistrano/
/usr/lib/ruby/vendor_ruby/dotenv/capistrano/recipes.rb
/usr/lib/ruby/vendor_ruby/dotenv/format_error.rb
/usr/lib/ruby/vendor_ruby/dotenv/environment.rb
/usr/lib/ruby/vendor_ruby/dotenv/railtie.rb
/usr/lib/ruby/vendor_ruby/dotenv/version.rb
/usr/lib/ruby/vendor_ruby/dotenv-rails.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/1.9.1/
/usr/share/rubygems-integration/1.9.1/specifications/
/usr/share/rubygems-integration/1.9.1/specifications/dotenv-0.9.0.gemspec
/usr/share/rubygems-integration/2.0/
/usr/share/rubygems-integration/2.0/specifications/
/usr/share/rubygems-integration/2.0/specifications/dotenv-0.9.0.gemspec
/usr/share/doc/
/usr/share/doc/ruby-dotenv/
/usr/share/doc/ruby-dotenv/README.md
/usr/share/doc/ruby-dotenv/copyright
/usr/share/doc/ruby-dotenv/changelog.Debian.gz