dc-qt software package provides GUI frontend for the dc protocol, 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 dc-qt
dc-qt is installed in your system.
Make ensure the dc-qt package were installed using the commands given below,
$ sudo dpkg-query -l | grep dc-qt *
You will get with dc-qt package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | KDE |
| Package | dc-qt |
| Version | 0.2.0.alpha-4.3+b1 |
| Description | GUI frontend for the dc protocol |
| Sub Section | KDE |