ftp.ntua.gr:/mirror/ubuntu/dists/focal-updates/universe/debian-installer/binary-amd64/by-hash/SHA256/?C=N&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] d1fdadc358f17c678318448db70ab2648137e58b488fa..> 06-May-2021 12:54  7.8K  
[   ] 3be416f49652d15804d781c0c74d4453900b05ee052fb..> 06-May-2021 12:54  8.4K
Apache/2.2 Server at ftp.grnet.gr Port 80