How to create magnet link from torrent file

1. Create new torrent file:

   buildtorrent -a dht:// /path/to/bunch_of_files out.torrent
   

2. Add torrent file to your torrent client, tell it where your files could be found.

3. Run mkmagnet on torrent file:

   mkmagnet out.torrent
   

4. Post magnet link elsewhere.

Note: mkmagnet requires official bittorrent package installed (apt-get install bittorrent on debian/ubuntu).