"Torrent is a great way to transfer large files very quickly.
However most torrent clients are gui based and have quite some
impact on system resources (e.g. Azureus). rTorrent is a
lightweight client running from the terminal. Being able to run it
in a screen session (also upon boot) makes it ideal to also control
it from a remote location.
"However the current version provided in the ubuntu repositories
is very much outdates. It's version 0.6.x - and features not yet
encryption. So your ISP may throttel you bandwidth because of that.
The version in the coming Ubuntu release is (currently) v.0.7.4.
Also this version is already outdated. The current rTorrent release