=====Removing owncloud trash====
As the ownCloud server administrator, you have two occ commands for permanently deleting files from the Open OCC Trashbin manually, without waiting for the normal aging-out process:

===== Open OCC  =====

  sudo -u apache php /var/www/html/owncloud/occ trashbin:cleanup
  
on Debian:

  sudo -u www-data php /var/www/html/owncloud/occ trashbin:cleanup


==== Trashbinning ====

  trashbin
  trashbin:cleanup   Remove deleted files
  trashbin:expire    Expires the users trashbin

The trashbin:cleanup command removes the deleted files of all users, or you may specify certain users in a space-delimited list. This example removes all the deleted files of all users:

  sudo -u www-data php occ trashbin:cleanup
  Remove all deleted files
  Remove deleted files for users on backend Database
  user1
  user2
  user3
  user4

This example removes the deleted files of user2 and user4:

  sudo -u www-data php occ trashbin:cleanup user2 user4
  Remove deleted files of user2
  Remove deleted files of user4
trashbin:expire deletes only expired files according to the trashbin_retention_obligation setting in config.php. The default setting is auto, which keeps files in the trashbin for 30 days, then deletes the oldest files as space is needed to keep users within their storage quotas. Files may not be deleted if the space is not needed.

The default is to delete expired files for all users, or you may list users in a space-delimited list:

  sudo -u www-data php occ trashbin:cleanup user1 user2
  Remove deleted files of user1
  Remove deleted files of user2
See the Deleted Files section in Config.php Parameters, and the Trashbin section of Using the occ Command.
From; [[https://doc.owncloud.org/server/9.1/admin_manual/configuration_files/trashbin_options.html]]