ftp.ntua.gr:/mirror/ubuntu/dists/groovy/main/binary-amd64/by-hash/SHA256/?C=S&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] 3dd98cbf8018152bd8dc507e0205c57cdeed30c0c7a75..> 22-Oct-2020 16:30  1.7M  
[   ] 89722f7bbb3d3505115a91a6b48dddb1736fc07f2d5d8..> 22-Oct-2020 16:30  1.3M  
[   ] 17f9d797350aa55fd5bef53664d8b725f3dc496646b8b..> 24-Apr-2020 16:54   96
Apache/2.2 Server at ftp.ntua.gr Port 80