Hello ,
I have a server linux debian , it was running a site on my server and site was working well .
2 days ago i removed site and moved prestashop from other host which i configured to my linux server .
the problem is prestashop dosent have permission to edit and change file inside /var/www .
if i change all files and folder permission to 0777, prestashop working well , but as soon as i change files and folder permission to 0644 and 0755 it is stop working .
after lots of search find out that /var/www group and owner is root user , becuse of that prestashop not able to change any file that needed .
i read this topic http://forums.phpfreaks.com/topic/186274-debian-varwww-file-permissions/
but dont know how can i give permission to prestashop to work with /var/www , prestashop dosent have any user that i can to give it permission to work with /var/www
any advise i appreciate