ftp.ntua.gr:/ubuntu/dists/focal-security/main/signed/linux-amd64/?C=N&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[DIR] 5.4.0-71.79/                                     14-Apr-2021 17:40    -   
[DIR] 5.4.0-72.80/                                     15-Apr-2021 23:34    -   
[DIR] 5.4.0-73.82/                                     12-May-2021 12:19    -   
[DIR] current/                                         12-May-2021 12:19    -
Apache/2.2 Server at ftp.ntua.gr Port 80