ftp.ntua.gr:/mirror/ubuntu/dists/groovy/main/signed/linux-oem-osp1-amd64/current/?C=D&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] SHA256SUMS                                       24-Apr-2020 17:01   80   
[   ] SHA256SUMS.gpg                                   24-Apr-2020 17:01  819   
[   ] signed.tar.gz                                    24-Apr-2020 17:01   16M
Apache/2.2 Server at ftp.ntua.gr Port 80