An update: I am adding a link to a post where I share my thoughts about the additional steps required to protect a Linux system against physical access to data. I add it at the top of this article, because I want some insight from you – the people who might read this post. It…
Linux boot sequence includes many stages. Following the BIOS initialisation, the boot loader is being called (GRUB or GRUB-EFI), then GRUB does its magic, and then it loads the kernel and the init RAM FS (initramfs or initrd) to memory. Following that, the kernel is jumped to, and a set of scripts are called from…
Modern Kernel specification (can be seen here) defined the initial ramdisk (initrd or initramfs, depends on who you ask) to allow stacking of compressed or uncompressed CPIO archives. It means, in fact, that you can extend your current initramfs by appending a cpio.gz (or cpio) file at the end, containing the additions or changes to…
