From b2evolution manual
This man page was last updated for b2evolution version 3.3.1
Not all configuration settings can be changed through the backoffice.
Some advanced settings can only be changed by editing the configuration files in the /blogs/conf directory.
This page points to some of these settings:
_config.php is b2evolution's main config file. This file is modified during the setup process, unless you manually enter correct settings beforehand. (Note: in later versions of b2e these settings are kept in the _basic_config.php file.
* Database settings: * DB_HOST * DB_NAME * DB_PASSWORD * DB_USER
* $baseurl is where your blogs reside by default. CHECK THIS CAREFULLY or nothing will work.
_advanced.php includes advanced settings for b2evolution.
* $online_session_timeout : Set the length of the online session time out (in seconds). This is for the "Who's Online?" block. (Added in 0.9.2) * $use_obhandler : use output buffer. This is required for gzip and ETags (see below). * $use_gzipcompression : GZIP compress all output. * $use_etags : send an ETag with every page.
_admin.php sets how the back-office works.
_formatting.php sets how b2evolution will parse and format texts (posts, comments, etc.)
_locales.php sets the default configuration for locales.
_stats.php sets how b2evolution will log hits and stats