ftp.ntua.gr:/ubuntu/dists/bionic-security/main/signed/linux-gke-4.15-amd64/current/?C=D&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] signed.tar.gz                                    24-Feb-2021 12:58   15M  
[   ] SHA256SUMS.gpg                                   24-Feb-2021 12:58  819   
[   ] SHA256SUMS                                       24-Feb-2021 12:58   80
Apache/2.2 Server at ftp.ntua.gr Port 80