Add lines in every /home/userxxx/public_html/.htaccess file

I have multiple cpanel websites with this file/dir structure: /home/user0/public_html/.htaccess /home/user1/public_html/.htaccess /home/user2/public_html/.htaccess etc.. And would like to add (not just replace the whole .htaccess ) at bottom of the file couple new lines, such as: # order deny,allow deny from all Is there a way to do that in one bulk process?