ftp.ntua.gr:/ubuntu/dists/bionic/main/installer-amd64/current/images/hd-media/?C=N&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] boot.img.gz                                      26-Apr-2018 00:23   27M  
[   ] initrd.gz                                        26-Apr-2018 00:23   18M  
[   ] vmlinuz                                          26-Apr-2018 00:23  7.9M
Apache/2.2 Server at ftp.ntua.gr Port 80