Ubuntu, as you may know, includes a Gnome client for BitTorrent in its base installation. This is a good thing. But in comparison to BitTornado, the Gnome client just seems a tad slow. Maybe it's really just my imagination, but my downloads seem to be completing faster.
BitTornado is a set of command line utilities for working with BitTorrent files. What I use most often is
btdownloadcurses, which is a curses interface to downloading torrent files.
Install BitTornado using:
sudo apt-get install bittornado
The format for using BitTornado is:
This opens a curses-based interface looks like this:
There's an alternative command,
btdownloadheadlesswhich you can use to effect a torrent download in the background. I rarely use it, though, because I prefer to see the progress of my download (watched pots and boiling notwithstanding).