ftp.ntua.gr:/ubuntu/dists/focal-backports/universe/source/by-hash/SHA256/?C=N&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] 4aa702e4ccb00555efb6c01893facd901f3324642edf2..> 18-Oct-2019 13:50  110   
[   ] dff75b4400e965ba45120de9fcc564874ed0047a729cb..> 16-Mar-2021 08:06  2.1K  
[   ] e9a9895f28c08c781bcad6a29fd3fc03139aa5d6d0bb5..> 16-Mar-2021 08:06  2.1K
Apache/2.2 Server at ftp.ntua.gr Port 80