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Files in the data directory (/var/www/html/wordpress/wp-content/uploads/civicrm/custom/) should not be downloadable.(4) Outdated tokens in use - Please review your contribution_invoice_receipt message template and remove references to the token {$display_name} as it has been replaced by {contact.display_name}.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!

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(4) Outdated tokens in use - Please review your contribution_invoice_receipt message template and remove references to the token {$display_name} as it has been replaced by {contact.display_name}.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!