KTorrent is a the BitTorrent client for KDE.

Installation

Install ktorrent package.

Troubleshooting

Without geoip, KTorrent is unable to show any information about the seeders, leechers and the current trackers. Install it as a dependency. It is advised to enable DHT inside the Settings to avoid slow speeds and low amount of seeders.

Script to manage it in command line

Since KTorrent is a GUI only application, it fortunately has a DBUS interface, so you can use scripts to manage it in command line (i.e. from SSH). See the following linuxquestions forum answer for details.