• Android: Play store, Sources
• iOS
• PC/Mac

• Config directory: /home/${USER}/.local/share/data/ownCloud/

Assuming that latest version is 8.1.1 and your webserver runs with www-data user

• cd <YOUR_WWW_ROOT>
• sudo -u www-data wget “https://download.owncloud.org/community/owncloud-8.1.1.tar.bz2”
• sudo -u www-data tar xjf owncloud-8.1.1.tar.bz2
• sudo -u www-data php owncloud/occ upgrade
• sudo -u www-data rm owncloud-8.1.1.tar.bz2

1. Add a suffix to your existing owncloud folder or move it away
2. Upload to your server latest owncloud version
3. Move back “data” and “config” folders from previous installation to the newest just uploaded