ftp.ntua.gr:/ubuntu/dists/xenial-updates/main/signed/linux-amd64/current/?C=D&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] signed.tar.gz                                    20-Apr-2021 13:18   27M  
[   ] SHA256SUMS.gpg                                   20-Apr-2021 13:18  916   
[   ] SHA256SUMS                                       20-Apr-2021 13:18   80
Apache/2.2 Server at ftp.ntua.gr Port 80