Hello.
I have understood that the graphic files I need to change are inside the file called "initrd.gz" that's inside this folder :
/home/ziomario/Scrivania/PassT-Cubic/Debian-new/custom-disk/d-i/gtk/
I should decompress it and I will have the file called "initrd",that's a cpio file. The images that I should edit are inside this archive / folders :
initrd/usr/share/graphics
and they are called : logo_debian.png and logo_debian_dark.png ;
at this point this is what I did to add two new image files inside the archive in the same position of the old ones :
chmod +w -R /home/ziomario/Scrivania/PassT-Cubic/Debian-new/custom-disk/d-i/gtk/
echo logo_debian_dark.png | cpio -H newc -o -A -F initrd/usr/share/graphics
but unfortunately this is not the proper command to issue :
cpio: can't open initrd/usr/share/graphics: Is not a directory
how to fix that ?
Mario.