ftp.ntua.gr:/ubuntu/dists/focal/main/uefi/grub2-amd64/current/?C=S&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] grubx64.efi.signed                               16-Apr-2020 15:53  1.6M  
[   ] grubx64.efi                                      16-Apr-2020 15:53  1.6M  
[   ] grubnetx64.efi.signed                            16-Apr-2020 15:53  1.4M  
[   ] grubnetx64.efi                                   16-Apr-2020 15:53  1.4M  
[   ] gcdx64.efi.signed                                16-Apr-2020 15:53  1.4M  
[   ] gcdx64.efi                                       16-Apr-2020 15:53  1.4M  
[   ] SHA256SUMS.gpg                                   16-Apr-2020 15:53  1.5K  
[   ] SHA256SUMS                                       16-Apr-2020 15:53  650   
[   ] version                                          16-Apr-2020 15:53   15   
[DIR] control/                                         16-Apr-2020 15:53    -
Apache/2.2 Server at ftp.ntua.gr Port 80