ftp.ntua.gr:/mirror/ubuntu/dists/groovy-updates/main/signed/linux-azure-amd64/current/?C=N&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] signed.tar.gz                                    11-May-2021 20:13   20M  
[   ] SHA256SUMS.gpg                                   11-May-2021 20:13  819   
[   ] SHA256SUMS                                       11-May-2021 20:13   80
Apache/2.2 Server at ftp.ntua.gr Port 80