A basic installation¶
Since we are dealing with the core of TYPO3 CMS it might help us to make a totally trimmed down installation of TYPO3 CMS with only the core and the required system extensions (i.e. system extension which are always installed and can not be removed).
The installation process is covered in the Installation and Upgrade Guide. You should perform the basic installation steps and not install any distribution. This will give you the “lightest” possible version of TYPO3 CMS.
Log into your basic installation and move to the ADMIN TOOLS > Extensions module. You will see all extensions which are loaded by default. The required extensions are not only loaded by default, but have no “Activate/Deactivate” button.
The most important thing to note for now is that everything is an extension in TYPO3 CMS. Even the most basic functions are packaged in a system extension called “core”.