ftp.ntua.gr:/ubuntu/dists/focal-security/main/signed/linux-gkeop-amd64/?C=S&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[DIR] current/                                         12-May-2021 12:18    -   
[DIR] 5.4.0-1015.16/                                   12-May-2021 12:18    -   
[DIR] 5.4.0-1014.15/                                   16-Apr-2021 00:19    -   
[DIR] 5.4.0-1013.14/                                   14-Apr-2021 17:39    -
Apache/2.2 Server at ftp.ntua.gr Port 80