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Once the initial root file system is up, the kernel executes /linuxrc as its first process; [4] when it exits, the kernel assumes that the real root file system has been mounted and executes /sbin/init to begin the normal user-space boot process. [3] In the initramfs scheme (available since the Linux kernel 2.6.13), the image may be a cpio ...
A bootable device can be storage devices like floppy disk, CD-ROM, USB flash drive, a partition on a hard disk (where a hard disk stores multiple OS, e.g Windows and Fedora), a storage device on local network, etc. [7] A hard disk to boot Linux stores the Master Boot Record (MBR), which contains the first-stage/primary bootloader in order to be ...
Unlike existing Linux boot images, the Dracut framework attempts to introduce as little hard-coded logic into the initramfs as possible. [1] The initramfs has essentially one purpose: locating and mounting the real root file system so that the boot process can transition to it. [1] This functionality is dependent on device availability. [1]
This feature is implemented in live-initramfs and allows the user to run a live distro that does not run from ram by default by adding toram to the kernel boot parameters. [ 1 ] Additionally some distributions can be configured to run from RAM, such as Ubuntu using the toram option included in the Casper scripts .
Linux kernel boot and decompression process. vmlinux is a statically linked executable file that contains the Linux kernel in one of the object file formats supported by Linux, which includes Executable and Linkable Format (ELF) and Common Object File Format (COFF).
This disallows a root user to load arbitrary code via kexec and execute it, complementing the UEFI secure boot and in-kernel security mechanisms for ensuring that only signed Linux kernel modules can be inserted into the running kernel. [4] [5] [6] Kexec is used by LinuxBoot to boot the main kernel from the Linux kernel located in the firmware.
LinuxBoot is a free software project aimed at replacing most of the Driver Execution Environment (DXE) modules in Unified Extensible Firmware Interface (UEFI) firmware with the Linux kernel. LinuxBoot must run on top of hardware initialisation software in order to start. This can be the Pre-EFI Initialization (PEI) part of UEFI, coreboot, or U ...
Harald Hoyer is a computer programmer and photographer, best known for developing the dracut initramfs generator and framework, [1] the udev device manager of Linux, [1] the systemd replacement for the System V init daemon [1] and the Gummiboot EFI boot loader. [2] Harald Hoyer also made various contributions to the Linux Kernel, starting 1997. [3]