Hi, Long Wind wrote: > /debian/dists/Debian9.4/main/installer-i386/current/images/hd-media > it's in directory above
Do you mean something like http://ftp.debian.org/debian/dists/stretch/main/installer-i386/current/images/hd-media/ ? It seems hardly to be capable of doing anything without the files from an installation ISO. https://www.debian.org/releases/stretch/i386/ch04s03.html.en#usb-copy-easy says that you first put uncompressed hd-media/boot.img.gz onto an USB stick (to get an unpartitioned 1 GB stick with FAT filesystem, bleh), then download a netinst ISO and put it as file into the filesystem on the USB stick. The strings in "/initrd.gz" look like it can find the ISO image and mount it in order to use its files. So the whole image seems to be a USB stick frontend to (small) i386 or amd64 installation ISOs, which meanwhile are ready for USB stick on their own. > is it possible to create a bootable CD from it? Rather not. if you mount it as FAT filesystem and look at its content, there is not much more than a SYSLINUX bootloader, a Linux kernel "/linux", and two initial ramdisks "/initrd.gz", "/initrdg.gz". There is no file "isolinux.bin" and no EFI System Partition in boot.img.gz. So there is no software for the first step of booting from CD, neither for BIOS nor for EFI. So even if the necessary files for the second stage of a SYSLINUX bootloader are present, you'd still need to get ISOLINUX files ("isolinux.bin" and maybe others) to bridge the gap between BIOS and the second stage of ISOLINUX or SYSLINUX. You could pick the missing files from the installation ISO, which you have to download anyways. Its file /.disk/mkisofs would give you an idea how to pack up all files as bootable ISO for CD. But why build a new ISO when you already have downloaded a good one ? Have a nice day :) Thomas
