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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.
Therefore, instead of having hard-coded scripts to determine device availability and suitability, Dracut's initramfs depends on the Linux device manager to create symbolic links to device nodes. When the root file system's device node appears, Dracut mounts it as the new root file system.
Instead, a configuration file (/etc/lilo.conf) is created in a live system which maps raw offset information (mapper tool) about location of kernel and ram disks (initrd or initramfs). The configuration file, which includes data such as boot partition and kernel pathname for each, as well as customized options if needed, is then written ...
During the Linux startup process, klibc is loaded from within a temporary RAM file system, initramfs. It is incorporated by default into initial RAM file systems that are created by the mkinitramfs script in Debian [6] and Ubuntu.
Distributions such as Debian Live, Mandriva One, Puppy Linux, Salix Live and Slax use this combination. The AppImage project, which aims to create portable Linux applications, uses Squashfs for creating AppImages. The snap package system also uses Squashfs as its file container format. Squashfs is also used by Linux Terminal Server Project and ...
switch root — Use from PID 1 under initramfs to free initramfs, chroot to NEW_ROOT, and exec NEW_INIT. sync — Write pending cached data to disk (synchronize), blocking until done. sysctl — Read/write system control data (under /proc/sys). tac — Output lines in reverse order. tail — Copy last lines from files to stdout.
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Traditionally, when creating a bootable kernel image, the kernel is also compressed using gzip, or, since Linux 2.6.30, [3] using LZMA or bzip2, which requires a very small decompression stub to be included in the resulting image. The stub decompresses the kernel code, on some systems printing dots to the console to indicate progress, and then ...