.. include:: /Includes.rst.txt .. _administration: Administration -------------- Linkvalidator is a system extension. If you are using Composer, you can install it like any other (core) extension requiring the package `typo3/cms-linkvalidator`. If you are not using Composer, you may have to activate Linkvalidator in the Extension Manager. Linkvalidator uses the HTTP request library shipped with TYPO3. Please have a look in the :ref:`Global Configuration `, particularly at the HTTP settings. There, you may define a default timeout. Generally, it is recommended to always specify timeouts when working with Linkvalidator.