Written for the KDE interface, KTorrent is the default torrent downloader for Kubuntu and some other KDE distributions. KTorrent has always been considered one of the top torrent programs and is the most feature-rich.
best torrent client
If you prefer Deluge but prefer KDE over GNOME, then KTorrent is the choice.
To install this program in Kubuntu type the following command into Terminal
sudo apt-get install ktorrent
Pactimza