ftp.ntua.gr:/ubuntu/dists/focal-proposed/main/uefi/grub2-amd64/current/?C=S&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] grubx64.efi.signed                               22-Mar-2021 22:58  1.6M  
[   ] grubx64.efi                                      22-Mar-2021 22:58  1.6M  
[   ] grubnetx64.efi.signed                            22-Mar-2021 22:58  1.4M  
[   ] grubnetx64.efi                                   22-Mar-2021 22:58  1.4M  
[   ] gcdx64.efi.signed                                22-Mar-2021 22:58  1.4M  
[   ] gcdx64.efi                                       22-Mar-2021 22:58  1.4M  
[   ] SHA256SUMS.gpg                                   22-Mar-2021 22:58  1.5K  
[   ] SHA256SUMS                                       22-Mar-2021 22:58  650   
[   ] version                                          22-Mar-2021 22:58   15   
[DIR] control/                                         22-Mar-2021 22:58    -
Apache/2.2 Server at ftp.ntua.gr Port 80