Set correct permissions on linux webserver (apache)

sudo chown -R www-data /var/www/example.com/htdocs/*
sudo chgrp -R www-data /var/www/example.com/htdocs/*

cd /var/www/example.com/htdocs/
sudo find -type d -exec chmod 750 {} \;
sudo find -type f -exec chmod 640 {} \;