ftp.ntua.gr:/ubuntu/dists/bionic-updates/main/installer-amd64/current/images/netboot/?C=N&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[DIR] xen/                                             05-Aug-2020 15:43    -   
[DIR] ubuntu-installer/                                05-Aug-2020 15:43    -   
[DIR] pxelinux.cfg/                                    05-Aug-2020 15:43    -   
[   ] pxelinux.0                                       05-Aug-2020 15:43   41K  
[   ] netboot.tar.gz                                   05-Aug-2020 15:43   64M  
[   ] mini.iso                                         05-Aug-2020 15:43   76M  
[   ] ldlinux.c32                                      05-Aug-2020 15:43  113K  
[   ] boot.img.gz                                      05-Aug-2020 15:43   64M
Apache/2.2 Server at ftp.ntua.gr Port 80