qBittorrent is a bittorrent client programmed in C++ / Qt that uses libtorrent (sometimes called libtorrent-rasterbar) by Arvid Norberg.
It aims to be a good alternative to all other bittorrent clients out there. qBittorrent is fast, stable and provides unicode support as well as many features.
Copy .torrent files to: /mnt/unionfs/downloads/torrents/qbittorrent/torrents/
Copy .torrent files for finished downloads to: /mnt/unionfs/downloads/torrents/qbittorrent/torrents/
Additionally you can set monitored folder to: /mnt/unionfs/downloads/torrents/qbittorrent/watched/
tick Run external program on torrent completion and paste this into the box: /usr/bin/unrar x -r "%F/." "%F/"
Warning
Make sure to choose a strong username/password combination because by default qBittorrent's Web API is completely exposed to the internet!
If someone guesses your qBit's credentials, they can, among other things, steal your tracker passkeys and delete torrents (data included).
If you don't need the API endpoints exposed, you can disable them using the inventory system with
qbittorrent_traefik_api_enabled:false
and by rerunning the qbittorrent tag.
Note
if you're using private trackers be sure to go to Options -> BitTorrent and uncheck everything in Privacy section.