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chmod -R 777 /var/www/html/vanilla/confRunning:
chmod -R 777 /var/www/html/vanilla/uploads
chmod -R 777 /var/www/html/vanilla/cache
chmod -R 777 /var/www/html/vanilla/{conf, uploads, cache}
chmod -R 775 /var/www/html/vanilla
chown -R apache:apache /var/www/html/vanilla
edited the .htaccess file in /var/www/html/vanilla to have correct path for RewriteBase
Comments
Anyway, as you set all the writable dirs to 777, it should be OK.
Try to find some log files (apache, php) that might give some more indication.
I am running Apache 1.1, MySQL 5.1.44, and PHP 2.02. Somehow, opening up the executable files in some of the folders managed to get rid of conf and uploads's problems, but not cache's.
setting /var/www/html/vanilla to 0775 not good. It should be 0755 and your www folder should be 0750
grep is your friend.