sorry my english,i pull nextcloud27 and after run find config dictionary no have config.php,only have config.sample.php,how can i config nextcloud?
Copy your old config.php to this directory or if you start fram scratch cp config.sample.php config.php and edit it…
copy config.sample.php to be your config.php and edit what you need 
thank you ，nextcloud after run，will create config file。thank you too