![]() ![]() But sometimes, the design decisions of distro maintainers or Syslinux/Isolinux developers leave us no choice but to create additional files so that the media can actually boot. you need to create USB installation media from bootable ISOs (Windows, Linux, UEFI, etc. ![]() I will point out that Rufus is very much designed to create media that is as close a possible to the original ISO content. Rufus is a utility that helps format and create bootable USB flash drives, such as USB keys/pendrives, memory sticks, etc. If you look at the content of the /syslinux.cfg that Rufus created (this is a mere text file) you will see that all it does, really, is point the syslinux bootloader to the actual location of the Alpine syslinux configuration files by issuing the Syslinux commands : DEFAULT loadconfigĪnd with this, a media that would fail to boot in BIOS mode, because Syslinux wouldn't be able to read its configuration files, is actually able to boot. As new versions of Syslinux are not compatible with one another, and it wouldn’t be possible for Rufus to include them all, two additional files must be downloaded from the Internet (‘ldlinux. Rufus alerts the user that it needs to download 2 Syslinux components from its server. So, we need to tell our BIOS Syslinux bootloader where the original syslinux config files are located, which we do by using the standard location where a Syslinux bootloader expects to read its configuration file, which is /syslinux.cfg. The syslinux.cfg you find on the root of the drive simply tells the HDD syslinux bootlodaer where to find the actual syslinux/isolinux configuration files from the ISO. Here is the hexdump of the isolinux. However, the problem we are faced when doing that is that distro maintainers will usually have their BIOS isolinux config files into something like /isolinux/isolinux.cfg or, even if they try to use a config location that is more palatable for disk-based syslinux, they may put it in a nonstandard location, such as /boot/syslinux/syslinux.cfg. Rufus only reports what it sees, and if it says an ISO uses Syslinux 6.04, its because the developers of said ISO set their version of Syslinux to exactly that. ![]() The reason we need to do that is that is that, for BIOS syslinux boot, we need to install out own syslinux bootloader, because the isolinux bootloader is devised for optical boot only, and cannot be used for disk-based boot. The syslinux.cfg you find on the root of the drive simply tells the HDD syslinux bootlodaer where to find the actual syslinux/isolinux configuration files from the ISO. ![]()
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