ftp.ntua.gr:/ubuntu/dists/groovy-security/main/debian-installer/binary-amd64/by-hash/SHA256/?C=S&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] 787f00ba5efa17c4de11c72b9392aecff1238afbb2653..> 11-May-2021 23:27   86K  
[   ] 2737a914d03e11878341bcb1a7247c04d07dbf3710475..> 11-May-2021 23:27   70K
Apache/2.2 Server at ftp.ntua.gr Port 80