ftp.ntua.gr:/debian/dists/Debian9.13/main/installer-armhf/20170615/images/netboot/?C=N&O=D 
Icon  Name                                                           Last modified      Size  
[DIR] Parent Directory                                                                    -   
[   ] vmlinuz                                                        15-Jun-2017 11:34  3.5M  
[   ] tftpboot.scr                                                   15-Jun-2017 11:34  796   
[   ] netboot.tar.gz                                                 15-Jun-2017 11:34   26M  
[   ] initrd.gz                                                      15-Jun-2017 11:34   20M  
[DIR] gtk/                                                           15-Jun-2017 23:55    -   
[   ] boot.scr                                                       15-Jun-2017 11:34  1.5K  
[DIR] SD-card-images/                                                15-Jun-2017 23:55    -
Apache/2.2 Server at ftp.ntua.gr Port 80