title: Resume partial download using Linux command line tool
body: <p>I realize that this question is not unlike asking someone for the name of a song one cannot remember anything about except that one liked it. Sorry, but it bugs me just like such a song.</p>
  
  <p>A while back I came across some command line tool that prepares a file in order to allow one to resume aborted downloads. If I remember correctly it is quite an old tool and essentially it generated a second file which includes something like block info of the original one. The generated file is small and made available for download. One can then fetch the actual file using this meta file and can resume broken downloads (so, it is bit like a .torrent except not for p2p.)</p>
  
  <p>Does anyone know the name of this command, please? If so, does it still make sense to use it or is rsync a better option?</p>
  
  <p>Thanks,
  HC</p>