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Questions tagged [initramfs]

The "initial RAM file system" is the successor of initrd. It is a root filesystem that is embedded into the kernel and loaded early in the boot process.

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58 views

file /proc/cmdline is empty

I'm having a problem to boot my system, because the initramfs which should get its values from /proc/cmdline, such as the root device, isn't able to obtain any value, and that's because this file is ...
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Where is the documentation for the IP variable in initramfs.conf?

Multiple sources, including this one, mention using the IP variable in initramfs.conf to set a static IP address in the pre-boot environment, and I have used this successfully in the past. However, ...
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Initramfs not able to mount /system

I Built 3.18 kernel for my android device. its stuck at init where the init is supposed to find the /system from Android DT and mount it , unfortunately it fails to find the location the error from ...
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1answer
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Get packed/unpacked initrd (initial ramdisk) files running again

Ahoy friends. Currently i'm trying to get Parted Magic running on my PXE server providing NFS support. So i had to edit the initrd.img file, had to add the scripts, and everything worked well. But ...
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Kernel Panic - Not syncing : VFS: unable to mount root fs on unknown-block (0,0)

After updating more than ~1000 things my installation of RHEL 2.6.32-220.el6.x86_64. I get the following kernel panic message: Kernel Panic - Not syncing : VFS: unable to mount root fs on unknown-...
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How does initramfs mount root filesystem?

The iniramfs is like a small os which mount root file system and hand over control to systemd. So, how does initramfs work internally? Is there any scripts executed to mount the root in linux?
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Boot problems with empty fstab in initramfs

I have recently reinstalled my Linux Mint 19.2 from a USB which went fine. Upon starting the system, though, it get's stuck at initramfs. The error messages above state Mount: mounting /dev on /root/...
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Initramfs not reading new configuration/scripts

I am trying to add some custom initramfs scripts to /etc/initramfs-tools/scripts/init-bottom/. However, these are not executed at next boot, after having rebuilt with # update-initramfs -u In fact, ...
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LVM on LUKS FDE: GRUB won't mount my root partition / during boot even though cryptomount and cryptdevice are given in grub.cfg

I have a triple boot setup (3xLinux). All Linuces share /home and swap, and their / partitions are next to each other. All reside in an LVM on LUKS: # lsblk NAME MAJ:MIN RM ...
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1answer
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Disabling Hibernation Boot on Debian Buster

i recently installed Debian 10 Buster with KDE Plasma Desktop to my laptop. When i logon, system starts up the apps while they were open before shutdown. I edited the file /etc/initramfs-tools/conf....
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1answer
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How can I implement resuming from hibernation in my initramfs script? (swap file on encrypted root partition)

So I messed up and executed echo disk > /sys/power/state instead of echo mem > /sys/power/state accidentally. And then realized what I had just done. Some details about the setup: It's using ...
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1answer
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How to autoprobe block devices in initramfs?

I am building a custom Alpine image based on isolinux. Basically, I am squashing rootfs, and mounting it as overlayfs. Bootloader does its job fine, kernel loads, but I am stuck at initramfs. Let ...
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1answer
140 views

initramfs unpacking failed: uncompession error (debian 10) [closed]

I've use debian 8-9-10 in my old Lenovo Idepan 310 without any probelem since 3 years ago, previously I also use Debian 8 in my two asus laptops without problems. Today is my first time seeing ...
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What does this dracut log output mean? Why is there an infinite loop?

I'm fighting a server with Centos 7 that doesn't start. I've no idea why. I found that I can pass the rd.debug parameter to the kernel and it logs a LOT of dracut initialization messages. 1.6MB in ...
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1answer
917 views

update-initramfs command not found

How can I update initramfs somewhat how it is described elsewhere for adding firmware? For a Debian 10 I get a command not found error. initrafs-tools is installed. root@pc:/home/.../linux-firmware/...
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Early User Space Init Not found

I have been compiling a kernel for my Android device and there is this problem that I have encountered. I have ported the kernel from v3.10.108 to 3.18. I have got the kernel to last part and solved ...
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1answer
92 views

how to populate /sys in a initramfs?

I'm trying to boot an OS (linux kernel) using the debian kernel so i needed to use an initramfs (as everything is builded as modules). But after booting into the initramfs, it doesn't seems to ...
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How grub tells kernel where to find initramfs?

In grub there is the following line which loads the initramfs file into memory: initrd16 /<initramfs_file>.img But how actually does kernel knows that its init is in that image ? Is it some ...
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1answer
148 views

Grub2/LUKS How to avoid to type the passphrase twice?

I am on the latest OpenSUSE Tumbleweed and this guide has not worked for me. I did everything like in the guide except I did not generate a new random key and added it to the harddisk but used the ...
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1answer
108 views

Kali Linux (old install) will not boot

Thank you to everyone for the advice, I have tried everything I could think of but nothing seems to solve the problem. I will format the drive and reuse it. I have this horrible feeling the drive may ...
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1answer
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Dependency failed for /boot LUKS on external USB drive after Debian update initramfs

Please somebody help me :( after a firmware update my Debian Sid with encrypted LUKS root does not boot clean anymore. At boot, after inserting my passphrase, there are a bunch of messages and a ...
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Initramfs problem. Alert! /dev/sda9 does not exist. Dropping to a shell!

I installed a new copy of parrot OS and I am facing this issue. I wiped my entire disk and tried again. The same problem has persisted. After entering the 'exit' command. This is the output I get. ...
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516 views

Stuck in BusyBox initramfs while booting Parrot OS 4.7 I don't know what to do

I installed Parrot OS 4.7 on Dual Boot with Windows 10 and this happens during booting I tried deleting the partition and reinstalling Parrot OS again but still the same issue! As you can seeThe image ...
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1answer
132 views

How to avoid “can't access tty; job control turned off” when boot to initramfs

i'm testing my custom initramfs now, but everytime the log there will have the "can't access tty; job control turned off". The /dev in initramfs has four files: null, sda1, ttyS0. The kernel ...
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2answers
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Custom initramfs not detected

I have custom initramfs that should start busybox shell. The cpio archive contains directory bin/ with busybox and init. busybox is statically linked binary: bin/busybox: ELF 64-bit LSB executable, ...
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Booting on a x64 machine with BIOS?

I have a packard bell ze7 it's a x64 machine and it only has BIOS. Before I got it, I thought that's a non-existent combination... I'm building Gentoo by hand, my own initramfs, all that good stuff. ...
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2answers
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Kexec into new kernel, but I can't access the initramfs prompt!

I used kexec to successfully load my kernel, but it's just printing dmesg lines. How do I get out of this to drop into the initramfs prompt? Ctrl-Alt-F2 just loads a black screen and ctrl-c does ...
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No network at 3rd stage of PXE Boot

I try to boot with PXE an Ubuntu Image made from debootstrap on a Dell PowerEdge M610 with a Broadcom NetXtrem II (BCM 5709S) (bnx2 driver). When i try to boot, everythings goes well at the bios ...
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“apt-get dist-upgrade” reports error “depmod: ERROR: Bad version passed uname” and various warnings

Running # apt-get dist-upgrade produced the following warnings/errors: WARNING: missing /lib/modules/uname depmod: ERROR: Bad version passed uname (2 times) dpkg: warning: version 'uname' has bad ...
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1answer
129 views

What is the relationship between dracut and initramfs?

When experiencing a boot failure I see the system drop to a prompt which says dracut. It is my understanding dracut is used to generate an image of initramfs. What I'm confused about is that based on ...
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Custom built kernel produces non-bootable initramfs - CentOS 7

I've been building my own kernel (4.19.37) and have no issues during build (make) or install (make install_modules + make install). Everything seems to go fine until I execute grub2-mkconfig -o /boot/...
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2answers
129 views

Save variable from initramfs (at boot time)

How can I save environment variables at boot time before the real filesystem has been mounted ? I know there is /etc/environment but whithin initramfs that file is not accessible yet. I also thought ...
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Does /etc/fstab overwrite mounts done during initramfs

I am experimenting with an Archlinux VM and two virtual disks. I am trying to mount / as an OverlayFS with, for example: sda1 containng the lowerdir and sdb1 containing the upperdir and the workdir. ...
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1answer
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initrd and initramfs confusions

I read from arch wiki: In case your root filesystem is on LVM, you will need to enable the appropriate mkinitcpio hooks, otherwise your system might not boot. However, both my initrd and ...
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1answer
967 views

Ubuntu 18.10 boots into initramfs busy shell [closed]

I am getting booted into the initramfs shell directly in ubuntu 18.10 I have tried the exit command which leads to the manual fsck is required on /dev/sda2 When I enter fsck /dev/sda2 the shell ...
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2answers
160 views

Why does systemd update trigger to build initramfs?

Today I got a systemd-242.0-3 update (plus some related). After installing that package, terminal shows initramfs is build from scratch. The output is like this: :: Running post-transaction hooks... (...
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Linux booting to initramfs on fresh load

I keep coming back to initramfs after installing various linux distros. The live usb works fine but once installed it is only booting to initramfs, forcing mount did not work and reinstalling windows ...
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unable to install pop-desktop

Usually I find a way around, but I don't understand what is the problem here: darknmy@pop-os:~$ sudo apt install pop-desktop Reading package lists... Done Building dependency tree Reading state ...
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1answer
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from Grub to initramfs to end kernel panic - surface 3

I installed lubuntu on my surface 3 and after updating it and restarting, it took me to grub so I did the following commands: grub> set root=(hd1,msdos1) grub> linux /vmlinuz(version no.) grub&...
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1answer
468 views

invalid line /etc/crypttab

I am troubleshooting a debian system that will not boot; the system booted fine, and one day ceased to do so (possibly but not definitely related to an apt upgrade). It has a small boot partition (...
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Unable to re-create initramfs using dracut

I am experimenting on some rescue situations using CentOS7 minimal image and virtualbox. I: deliberately deleted my initramfs file booted from CentOS7 minimal iso image entered into rescue mode ...
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trap signal in bash initramfs fails to work

inside /init bash script executed by the kernel in initramfs.img i need to send a signal to drop me to a rescue shell, so i have trap "exec /bin/bash" SIGINT but ctrl+C isn't effective. First why ...
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Are the only HOOKS available for me to use listed under the mkinitcpio -L command?

Are the only HOOKS available for me to use with my system listed within the output of the following command? $ mkinitcpio -L
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1answer
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Archived rootfs: convert tar to cpio for initramfs

I have a Debian rootfs as a tar file. I would like to specify it as the initramfs source in Kconfig (using PetaLinux), but the source must be a cpio archive. How can I convert the .tar to .cpio, ...
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1answer
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Content of initramfs

I've unpacked the cpio file initramfs-4.19.10-200.fc28.x86_64.img and only found this: . ├── early_cpio └── kernel └── x86 └── microcode └── GenuineIntel.bin Has this ...
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linux kernel auto load driver module

I want to know how linux kernel know which module must load on startup ? i know some modules must defined in /etc/modules . but what happened if i change physical hardware ? for example ...
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How to tell Linux where initramfs is in RAM

I'm trying to boot a Linux kernel running on top of Xen with a initramfs copied into RAM by the bootloader. In the device tree I took out a chunk of memory so the kernel will not overwrite the area ...
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bind to vfio-pci or pci-stub at startup

I'm trying to bind a NIC to pci-stub or vfio-pci at startup so my libvirt-managed VM can use it on autostart, but the NIC keeps being claimed by ixgbe. I tried inserting into /etc/initramfs-tools/...
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1answer
71 views

What frees the `.init.ramfs` image after it is unpacked into the `rootfs`?

Under the old initrd system, Linux used to free the initrd image. This was traced on the console: Freeing initrd memory: xxxxk freed. What this referred to was actually releasing the memory ...
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1answer
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Order of kernel upgrade commands for gentoo

I have simple bash script to update the kernel. It includes building the kernel, rebuilding external modules, building initramfs with genkernel and updating grub config, here is the script: #!/bin/...