ftp.ntua.gr:/ubuntu/dists/bionic/main/uefi/grub2-amd64/current/?C=S&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] grubnetx64.efi.signed                            05-Mar-2018 06:08  1.1M  
[   ] grubnetx64.efi                                   05-Mar-2018 06:08  1.1M  
[   ] gcdx64.efi.signed                                05-Mar-2018 06:08  1.1M  
[   ] gcdx64.efi                                       05-Mar-2018 06:08  1.1M  
[   ] grubx64.efi.signed                               05-Mar-2018 06:08  1.1M  
[   ] grubx64.efi                                      05-Mar-2018 06:08  1.1M  
[   ] gsbx64.efi.signed                                05-Mar-2018 06:08  1.0M  
[   ] gsbx64.efi                                       05-Mar-2018 06:08  1.0M  
[   ] SHA256SUMS.gpg                                   05-Mar-2018 06:08  819   
[   ] SHA256SUMS                                       05-Mar-2018 06:08  811   
[   ] version                                          05-Mar-2018 06:08   14   
[DIR] control/                                         05-Mar-2018 06:08    -
Apache/2.2 Server at ftp.ntua.gr Port 80