ftp.ntua.gr:/ubuntu/dists/focal-security/main/signed/linux-gke-amd64/?C=N&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[DIR] current/                                         12-May-2021 12:19    -   
[DIR] 5.4.0-1043.45/                                   12-May-2021 12:19    -   
[DIR] 5.4.0-1042.44/                                   16-Apr-2021 00:19    -   
[DIR] 5.4.0-1041.43/                                   14-Apr-2021 17:38    -
Apache/2.2 Server at ftp.ntua.gr Port 80