ftp.ntua.gr:/debian/dists/sid/main/installer-amd64/20190118/images/netboot/debian-installer/amd64/?C=N&O=D 
Icon  Name                                                                             Last modified      Size  
[DIR] Parent Directory                                                                                      -   
[DIR] pxelinux.cfg/                                                                    18-Jan-2019 22:43    -   
[   ] pxelinux.0                                                                       18-Jan-2019 22:43   41K  
[   ] linux                                                                            18-Jan-2019 22:43  4.9M  
[   ] initrd.gz                                                                        18-Jan-2019 22:43   28M  
[   ] grubx64.efi                                                                      18-Jan-2019 22:43  1.1M  
[DIR] grub/                                                                            18-Jan-2019 22:43    -   
[   ] bootnetx64.efi                                                                   18-Jan-2019 22:43  1.1M  
[DIR] boot-screens/                                                                    18-Jan-2019 22:43    -
Apache/2.2 Server at debian.noc.ntua.gr Port 80