ftp.ntua.gr:/ubuntu/dists/bionic-backports/restricted/source/by-hash/SHA256/?C=N&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] 1ecf8ede6a1ae61b641204572f1da419db07863163992..> 25-Oct-2017 02:16   64   
[   ] a7849bbc2b8d901c8d3698761f69091205009f7210b5e..> 25-Oct-2017 02:16  113   
[   ] e7ab72b8f37c7c9c9f6386fb8e3dfa40bf6fe4b678767..> 25-Oct-2017 02:16   40
Apache/2.2 Server at ftp.ntua.gr Port 80