ftp.ntua.gr:/debian/dists/stretch/main/installer-armhf/20170615+deb9u9/images/netboot/?C=N&O=D 
Icon  Name                                                               Last modified      Size  
[DIR] Parent Directory                                                                        -   
[   ] vmlinuz                                                            12-Jul-2020 20:49  3.6M  
[   ] tftpboot.scr                                                       12-Jul-2020 20:49  796   
[   ] netboot.tar.gz                                                     12-Jul-2020 20:49   26M  
[   ] initrd.gz                                                          12-Jul-2020 20:49   20M  
[DIR] gtk/                                                               12-Jul-2020 20:49    -   
[   ] boot.scr                                                           12-Jul-2020 20:49  1.5K  
[DIR] SD-card-images/                                                    12-Jul-2020 20:49    -
Apache/2.2 Server at debian.noc.ntua.gr Port 80