Can you please give your suggestions to help to solve the following system status warning?
(1) The CiviCRM debug log should not be downloadable.
(2) Files in the data directory (/var/www/html/wordpress/wp-content/uploads/civicrm/upload/) should not be downloadable.
(3) Files in the data directory (/var/www/html/wordpress/wp-content/uploads/civicrm/custom/) should not be downloadable.
(4) Outdated tokens in use - Please review your contribution_invoice_receipt message template and remove references to the token {$display_name} as it has been replaced by {contact.display_name}.
For (1),(2),and (3), can we solve the problem by setting the directory using ckmod 700? Many Thanks!