How to make Cacti working with ispCP

[motokochan]

Don't install web applications through apt. Those are packaged to work with Debian's default HTTPd configuration and file layout. ispCP changes the configuration.

You need to install Cacti manually. Cacti is very much a basic PHP application so if you follow the installation instructions on the Cacti website, it should install perfectly fine. You'll also need to create a database from within the control panel and import the sql script using that database user, but that's the only major difference.

Also, undo the changes you made to php.ini.