ftp.ntua.gr:/ubuntu/dists/xenial-security/main/signed/linux-gcp-amd64/current/?C=N&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] signed.tar.gz                                    16-Apr-2021 00:21   15M  
[   ] SHA256SUMS.gpg                                   16-Apr-2021 00:21  916   
[   ] SHA256SUMS                                       16-Apr-2021 00:21   80
Apache/2.2 Server at ftp.ntua.gr Port 80