ftp.ntua.gr:/ubuntu/dists/groovy/main/uefi/grub2-amd64/current/?C=D&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] SHA256SUMS                                       06-Oct-2020 20:48  650   
[   ] SHA256SUMS.gpg                                   06-Oct-2020 20:48  819   
[DIR] control/                                         06-Oct-2020 20:48    -   
[   ] gcdx64.efi                                       06-Oct-2020 20:48  1.4M  
[   ] gcdx64.efi.signed                                06-Oct-2020 20:48  1.4M  
[   ] grubnetx64.efi                                   06-Oct-2020 20:48  1.4M  
[   ] grubnetx64.efi.signed                            06-Oct-2020 20:48  1.4M  
[   ] grubx64.efi                                      06-Oct-2020 20:48  1.6M  
[   ] grubx64.efi.signed                               06-Oct-2020 20:48  1.6M  
[   ] version                                          06-Oct-2020 20:48   15
Apache/2.2 Server at ftp.ntua.gr Port 80