dolphin-owncloud software package provides ownCloud integration for Dolphin, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dolphin-owncloud
dolphin-owncloud is installed in your system.
Make ensure the dolphin-owncloud package were installed using the commands given below,
$ sudo dpkg-query -l | grep dolphin-owncloud *
You will get with dolphin-owncloud package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | KDE |
| Package | dolphin-owncloud |
| Version | 2.2.4+dfsg-1+b1 |
| Description | ownCloud integration for Dolphin |
| Sub Section | KDE |