1. extract
tar xzf rubytorrent-0.071.tar.gz
2. as it written entirely in the ruby programming language, you have to install ruby and libgtk2-ruby ( for GTK+ interface )
sudo apt-get install ruby libgtk2-ruby
3. command-line program is torrent.rb, the usage is
./torrent.rb -a tracker1 -a tracker2,tracker3 -f FILE -o TORRENT
# try tracker1 then try either tracker2 or tracker3 in random order
# you can specify only one parameter after -f so you will need create a directory for all files and sub-directories you need