ftp.ntua.gr:/mirror/ubuntu/dists/bionic-security/universe/debian-installer/binary-amd64/by-hash/SHA256/?C=M&O=D 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] f804dcd00d6ea567c37d4b09539f5e0d5519e9016f350..> 29-Apr-2021 14:27  164K  
[   ] 5c2b0448c7f53c584c58d9fcdea1379d0e0e95924a2a0..> 29-Apr-2021 14:27  135K
Apache/2.2 Server at ftp.ntua.gr Port 80