initrd is mainly designed to allow system startup to occur in two phases, where the kernel comes up with a minimum set of compiled-in drivers, and where additional modules are loaded from initrd. This document gives a brief overview of the use of initrd.

2024年3月18日 · initrd gives us the ability to load a RAM disk by the bootloader. The loaded RAM disk is mounted as the root file system, and different programs are run from it. We can also mount a new root file system from a different device, making the bootloader move the former initrd root to a different directory, and we can unmount it.

In Linux systems, initrd (initial ramdisk) is a scheme for loading a temporary root file system into memory, to be used as part of the Linux startup process. initrd and initramfs (from INITial RAM File System) refer to two different methods of achieving this.

2024年6月17日 · initrd.img, short for “initial RAM disk,” is an older format that uses a file system image, requiring a loopback device for mounting and typically containing a minimal file system with necessary drivers and executables.

See the Linux kernel source file Documentation/admin-guide/initrd.rst (or Documentation/initrd.txt before Linux 4.10) as well as pivot_root(2) and pivot_root(8) for information on the modern method of changing the root filesystem.

2023年12月8日 · initrd stands for "initial RAM disk," a temporary root filesystem used in the boot process. The initrd is loaded by the bootloader along with the kernel image and is essential for the two-stage boot process that modern Linux systems use.

2023年6月26日 · In Linux, the initrd (initial RAM disk) and initramfs (initial RAM File System) are different methods we can use to load a temporary root file system to the RAM or system memory for successful…

2022年3月20日 · The initial RAM disk (initrd) is an initial root file system that is mounted prior to when the real root file system is available. The initrd is bound to the kernel and loaded as part of the kernel boot procedure…

When booting up with initrd, the system boots as follows: 1. The boot loader loads the kernel program and /dev/initrd's contents into memory. 2. On kernel startup, the kernel uncompresses and copies the contents of the device /dev/initrd onto device /dev/ram0 and then frees the memory used by /dev/initrd. 3.

2022年12月13日 · initrd and initramfs are two files that are used to store the initial configuration of a Linux system. initrd stores the kernel’s initial RAMdisk, while initramfs stores the user’s ramdisk. An initramfs is a file system that loads into memory during the boot process.