In order for Cacti to function properly, please edit the following: /etc/cacti/db.php /etc/cron.d/cacti /etc/http/conf.d/cacti.conf The installation procedure, briefly summarized: Create the cacti MySQL database: # mysqladmin create cacti Import the default cacti database: # mysql cacti < /usr/share/doc/cacti-0.8.8a/cacti.sql Create the user: # mysql mysql> GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY 'cactiuser'; (Use a different password in the above GRANT command.) Then visit http://localhost/cacti/ to complete the installation. Cacti's install procedure is not fully compatible with mod_security. If you use mod_security, please uncomment the SecRuleRemoveById lines in /etc/http/conf.d/cacti.conf. Cacti should work with SELinux. If you cannot get it to work, please file a bug.