ftp.ntua.gr:/mirror/ubuntu/dists/bionic-updates/main/installer-amd64/current/images/hd-media/?C=M&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] vmlinuz                                          05-Aug-2020 15:43  8.0M  
[   ] initrd.gz                                        05-Aug-2020 15:43   19M  
[   ] boot.img.gz                                      05-Aug-2020 15:43   27M
Apache/2.2 Server at ftp.grnet.gr Port 80