ftp.ntua.gr:/ubuntu/dists/groovy-backports/universe/source/by-hash/SHA256/?C=N&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] 1ee0f0c681f57ad8e1b97e10b894178e85d7f670cc33d..> 24-Apr-2020 16:55  111   
[   ] 45eb3aceb1c3d3ff0f6a652c4f9d00cf2c066914ee458..> 16-Mar-2021 08:05  2.0K  
[   ] f230e8e7a9b65e4448c08752dc9a3aa5b7a0af18dd1a4..> 16-Mar-2021 08:05  2.0K
Apache/2.2 Server at ftp.ntua.gr Port 80