# File lib/specinfra/command/base/file.rb, line 44
    def check_is_owned_by(file, owner)
      regexp = "^#{owner}$"
      if owner.is_a?(Numeric) || (owner =~ /\A\d+\z/ ? true : false)
        "stat -c %u #{escape(file)} | grep -- #{escape(regexp)}"
      else
        "stat -c %U #{escape(file)} | grep -- #{escape(regexp)}"
      end
    end