TYPO3 v8 has reached its end-of-life March 31st, 2020 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.

There is no further ELTS support. It is recommended that you upgrade your project and use a supported version of TYPO3.

System Modules

In the User Management chapter we already visited the Access and Backend Users module. Here is a brief presentation of the other modules.


The Install Tool is presented in the Installation Guide. It can be accessed directly from the TYPO3 CMS backend.


The TYPO3 CMS backend traces a number of actions performed by users: login, cache clearing, database entries (creation, update, deletion), settings changes, file actions and errors. A number of filters are available to help digging into this data.

The Log module and its many filters

DB Check


"DB Check and Configuration are only available if the system extension "lowlevel" was installed and activated.

For Composer based systems (see also Best practices):

composer req typo3/cms-lowlevel

The Database (DB) Check module offers four functions related to the database and its content.

Overview of the DB check functions
Record Statistics

Simple shows a count of the various records in the database, broken down by type for pages and content elements.


Checks if some relations are empty or broken, especially with regards to files.


A tool to seach through the whole database. It offers an advanced mode which is nearly a visual query builder.

Check and update global reference index

TYPO3 CMS keeps a record of relations between all records. This may get out of sync when some operations are performed without the strict context of the backend. It is therefore useful to update this index regularly.


The Configuration module can be used to view the various configuration arrays used by TYPO3 CMS. It is not the goal of this tutorial to described the role of each of these arrays, you discover their function as you dig deeper into TYPO3 CMS. Let's just mention that the $GLOBALS['TYPO3_CONF_VARS'] contains global configuration values that you may have set in the Install Tool.

The Configuration module showing the global configuration array


The Reports module contains information and diagnostic data about your TYPO3 CMS installation. It is particularly worthwhile to regularly check out the "Status Report" as it will inform you about bad configuration, security issues, etc.

The Status Report of the Reports module