ftp.ntua.gr:/ubuntu/dists/xenial/universe/debian-installer/binary-amd64/by-hash/SHA256/?C=D&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] bbd4e8f3b0d4e2549894ce726c3a9a4c387e319c15ee8..> 20-Apr-2016 17:05   19K  
[   ] dba0ba2c61c1c7f7feeb1fbea611e5305505d03ff9673..> 20-Apr-2016 17:05   21K
Apache/2.2 Server at ftp.ntua.gr Port 80