Where is the ISPConfig 3 configuration file?

ISPConfig 3 has two different configuration files, one for the server part and one for the interface.

ISPConfig 3 Interface

The config file location is:

/usr/local/ispconfig/interface/lib/config.inc.php

ISPConfig 3 Server

The config file location is:

/usr/local/ispconfig/server/lib/config.inc.php

The MySQL root password that is used to create new MySQL databases only is stored in the file:

/usr/local/ispconfig/server/lib/mysql_clientdb.conf