/usr/lib/ruby/vendor_ruby/rails/generators/rails/app/templates/bin/rake is in ruby-railties 2:4.2.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | require_relative '../config/boot'
require 'rake'
Rake.application.run
|