ftp.ntua.gr:/ubuntu/dists/bionic-backports/restricted/binary-amd64/by-hash/SHA256/?C=M&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] 1ecf8ede6a1ae61b641204572f1da419db07863163992..> 25-Oct-2017 02:16   64   
[   ] 3cb4ac0b28bfb3ee2d9b0e761fb9eb99da7d5c1cea3a2..> 25-Oct-2017 02:16  112   
[   ] e7ab72b8f37c7c9c9f6386fb8e3dfa40bf6fe4b678767..> 25-Oct-2017 02:16   40
Apache/2.2 Server at ftp.ntua.gr Port 80