From BIOS to Subsystems. Lets review what happens when we boot Linux: The BIOS or a bootloader (lilo, zlilo, grub, etc) loads Linux Kernel from disk to memory, with some parameters defined in the bootloader configuration. We can see this process watching the dots that appear in the screen.Kernel file stays in the. directory, and is accessed only at this moment..5. When you'll create the RPM, put your Subsystem script in. and do not include any. link, because it is a user decision to make your subsystem automatic or not. If you include them and the user makes any change, the RPM file inventory will become inconsistent.