/usr/bin/php php generateTCAandExtTables.php -typo3src=[path_to_typo3_src] -module-dir=[path_to_module] -class="[class_in_namespace_annotation]"
example
/usr/bin/php php generateTCAandExtTables.php --typo3src=/var/www/typo3_src/ --module-dir=/var/www/development/plugins.typo3.af_scoutnet_coolplugin/ -class="ScoutNet\AfScoutnetCoolplugin\Domain\Model\Somemodel