how to fileshare with bittorrent in ubuntu

[user1]

>> I have tried several bittorrent clients 

The word azureus gave me a clue - THANKS 

I found some links, which I relate to my problem, which I share:

How to host and share a torrent:
http://www.azureuswiki.com/index.php/Host_and_share_your_torrents

How to get a static address on a dynamic (dhcp) address using dyndns:
http://www.dyndns.com/about/home_solutions.html

I have an older small fit-pc running, which could be used as a torrent 
server,
it only uses 11 w:
http://www.fit-pc.com/web/

(hoping it to help others)