Install Gollem File Manager Install application Inside your Root Project, run sudo -u www-data composer require horde/gollem ^5 Provide configuration Put backends.local.php config file into - var/config/gollem You can use web/gollem/config/backends.php as template Run the command sudo -u www-data composer horde-reconfigure Configure via Web UI Go to the web UI and generate the default config for the file manager app: /horde/admin/config/config.php?app=gollem On a fresh installation, the config UI will try to place the file in the web dir. This would result in the file vanishing on the next update. You need to move them to the persistent config dir. mv web/gollem/config/conf.php var/config/gollem/conf.php sudo -u www-data composer horde-reconfigure For later changes, the config UI should recognize the symlink and edit the target file instead. Setup the database tables Run this command: ./vendor/bin/horde-db-migrate up