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Where to find initramfs file in Linux kernel?
(Note that those two example “file” entries expect to find files named “init.sh” and “busybox” in a directory called “initramfs”, under the linux-2.6.* directory. See Early userspace support for more details.) The kernel does not depend on external cpio tools.
How is initramfs different from the old initrd?
All this differs from the old initrd in several ways: The old initrd was always a separate file, while the initramfs archive is linked into the linux kernel image. (The directory linux-*/usr is devoted to generating this archive during the build.)
What are the parameters of the kernel command line?
The kernel command line parameters, also known as kernel arguments, are used for boot time configuration of: The kernel command line parameters are often used to overwrite the default values and for informing the kernel about hardware parameters where the kernel would have problems to obtain such information.
Which is better ramfs or initramfs in Linux?
This has the memory efficiency advantages of initramfs (no ramdisk block device) but the separate packaging of initrd (which is nice if you have non-GPL code you’d like to run from initramfs, without conflating it with the GPL licensed Linux kernel binary). It can also be used to supplement the kernel’s built-in initramfs image.
How big is the initramfs archive in Linux 2.6?
The 2.6 kernel build process always creates a gzipped cpio format initramfs archive and links it into the resulting kernel binary. By default, this archive is empty (consuming 134 bytes on x86).
Do you need root access to initramfs file?
Run “usr/gen_init_cpio” (after the kernel build) to get a usage message documenting the above file format. One advantage of the configuration file is that root access is not required to set permissions or create device nodes in the new archive.