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2
votes
0answers
18 views

Unlock LUKS encrypted Debian root with key file on boot partition

I'm trying to decrypt the Debian root with a key file stored in the boot partition (decrypted partition). This will break the security, but it doesn't matter now. I have to conclude this successfully ...
1
vote
0answers
19 views

How to abort/cancel a running command in initramfs?

When I invoke a long-running command, e.g. du, I don't see a way to abort/cancel it (Strg/Ctrl+c doesn't work), other shells/ttys aren't available. Am I completely doomed after having started a long ...
1
vote
0answers
33 views

How to regenerate an initramfs with ash built-in shell?

I foolishly edited my /etc/mkinitcpio.conf and now my computer won't boot. It drops down to (initramfs). It claims it cannot find the root device. However, cat /proc/cmdline shows the correct UUID of ...
0
votes
0answers
32 views

fails to boot after reboot (update required), mouting failed and no init found

After updating my ubuntu system, it requires me to reboot the pc. So I did it and then the following message shows on the screen: mount: mouting /dev/loop0 on /root failed: Invalid argument mount: ...
1
vote
0answers
22 views

extract Embedded initramfs

I have a kernel in which one initramfs is embedded. I want to extract it. I got the output x86 boot sector when I do file bzImage I have System.map file for this kernel image. Is there any way to ...
0
votes
0answers
14 views

log_success_msg: not found while booting with in initramfs

I use the log_success_msg in a script which is into the init-bottom directory of my customized initramfs. I get the following error message: /scripts/init-bottom/__rootaufs.sh: line 154: ...
1
vote
0answers
16 views

MDADM Array Detection Slowing Down Boot - Why?

I have an AMD64 Gentoo (running systemd) build with a RAID0 root and some other arrays (RAID1 boot, RAID1 home etc..). The boot process is being slowed down quite dramatically as mdadm searches the ...
0
votes
0answers
66 views

Archlinux dm-crypt setup problem

I'm trying to setup dm-crypt to have complete encrypted volume and flash drive, that contains all the /boot partition.(i.e. in terms of archwiki I want to achieve #Plain dm-crypt(bit.ly/VNLKw0) ...
1
vote
0answers
62 views

How can I replace root / filesystem with another filesystem?

When the Linux kernel starts up, it uses initrd as the root / filesystem, then replaces that with a filesystem partition in fstab. Based on a test in an early init script, I want to replace that root ...
3
votes
1answer
60 views

eCryptfs key in kernel image or initramfs

I have an embedded Linux system with unencrypted kernel image and initramfs in NAND flash. My RootFS is in SD card. I want to encrypted some files on SD Card as my SD card is easily accessible ...
3
votes
1answer
367 views

Minimal Linux with kernel and BusyBox: /etc/inittab is ignored, only /init is executed

I managed to create a small and fully functional live Linux CD which contains only kernel (compiled with default options) and BusyBox (compiled with default options + static, all applets present, ...
6
votes
1answer
44 views

How do I know what decompression algorithms are compiled-in into the linux kernel?

If /proc/config.gz is unavailable, how do I know what decompression algorithms the running kernel is capable of using on a compressed cpio initramfs? Is the gzip algorithm always available, even when ...
4
votes
2answers
415 views

Live Distros: UBCD boot Deft, Caine, and Tails from Custom Menu

I'm building my own UBCD and I'm using dual layer to fit 7.5Gigs Useful resources for UBCD customization: The SYSLINUX Project UBCD Customize Casper Man Page Live Boot Man Page Here's my ...
2
votes
1answer
1k views

Arch Linux in Qemu : Failed to access perfctr msr error

I got the Arch Linux (march build) iso file through bittorrent lately. I tried to run it in VM, but it only gets up to the main screen (The screen where you select what you want to do) shown below: ...
2
votes
1answer
245 views

Boot resolution change in initramfs on laptop monitor and HDMI monitor

I have Linux Mint 17 on my laptop. Also I have 22'' monitor connected to laptop using HDMI cable. My disk if fully encrypted with LUKS and LVM. On boot I get graphical prompt to enter password for ...
2
votes
0answers
270 views

Server won't boot, kernel panic - not syncing

After a reboot of a CentOS 6.2 server we are getting a kernel panic with the following error: Kernel panic - not syncing: Attempted to kill init! Panic occurred, switching back to text console ...
3
votes
1answer
2k views

After installing a new Kernel in Ubuntu 14.04, rebooting takes me to busybox initramfs. How do I mount a filesystem after that?

I have a virtual machine with Ubuntu 14.04 in it. I recently built and installed linux-3.14.5 kernel on it, and tried to boot into it, but it drops me to BusyBox v1.21.1 built-in shell. Here's what I ...
3
votes
1answer
459 views

When would you use pivot_root over switch_root?

I'm wanting to understand the Linux init process better in order to netboot a system over ceph rather than nfs. In the process I've come across two forms of switching root. One called switch_root, ...
0
votes
0answers
53 views

Change Initramfs script

I made RAID 0 by mdadm'ing partition located on dmraid VIA VT6421 and Western Digital hdd. Installed Ubuntu on that RAID. Now, when I boot, I get (initramfs) ash prompt. There, I have to write mdadm ...
1
vote
1answer
103 views

Correct location of initramfs.cpio file when compiling kernel

I am following this article and generated an initramfs.cpio file. Now the tutorial mentiones that I have to put this file in build directory: Finally, you have to rebuild the kernel again: # 0. ...
1
vote
1answer
230 views

Difference between initramfs.cpio and rootfs.cpio

What are the differnces between the two? Can I just use initramfs.cpio or do I need to use both? Actually my rootfs.cpio file is 7 Mb and initramfs.cpio is just 0.5mb, so I was thinking if I can use ...
1
vote
0answers
154 views

Replacing default initramfs with my own

I followed this article to develop my own sample intramfs.cpio Now I have to put this in my kernel and compile. The procedure that I follw for petlinux is that I first run petalinux-config (and ...
-2
votes
1answer
59 views

Which would mount faster initrd or initramfs ? [closed]

I want to boot my linux as fast as possible. I have to make a choice between initrd and intiramfs. Which one should mount faster and have smaller size?
1
vote
2answers
106 views

Understanding a simple configuration file for initramfs

I am new to file system. Can somebody explain me what is happening in the following? # This is a very simple, default initramfs dir /dev 0755 0 0 nod /dev/console 0600 0 0 c 5 1 nod ...
1
vote
1answer
896 views

How to mark “not fully installed” apt-get package as “successfully installed”

I have installed Debian 7.4 on my Iomega ix2-200 NAS, following this blog. The ix2-200 is running an ARM Marvel CPU and has a 128 MB NAND flash memory. The flash contains an initramfs image (uInitrd) ...
5
votes
4answers
432 views

Why do I need initramfs ?

I found that if I choose jffs or sd as file system(and not initramfs),the kernel size is very small (1.4 MB as compared to with initramfs-3.4MB). It shows that initramfs takes concidreably large ...
3
votes
0answers
119 views

Changing a root file system from initramfs to JFFS2

I am running Linux on an ARM based development board from flash memory. The rootfs is initramfs. I chose this in the configuration utility under "file system". Then I realized that I need ...
2
votes
0answers
301 views

Why do I need to specify two init images - initrd and boot - inside KVM to boot to bash?

My machine is running inside a KVM virtual machine (Parallels Desktop v8), having a BIOS (not UEFI), having one SATA drive connected, one GPT partition on that disk, the partition is ext4 formatted, ...
5
votes
2answers
18k views

How to fix boot into initramfs prompt and “mount: can't read '/etc/fstab': No such file or directory” and “No init found”?

Installing a new system using a GPT partitioned disk dedicated to a single partition, ext4 formatted, extlinux (version 4.05) as bootloader, Ubuntu Core version 13.10 amd64 as rootfs, and Ubuntu ...
3
votes
1answer
464 views

How can I install Linux on a UEFI system with Secure boot?

My motherboard is a Gigabyte 990XA-UD3 (CPU 1), it's a UEFI -Dual boot, and when I try installing Linux Mint 16 Cinnamon or Ubuntu 13.10 it always bring this error (initramfs) Unable to find a medium ...
3
votes
1answer
802 views

How to set laptop screen brightness just after boot with full disk encryption

my girlfriend bought Lenovo Essential G500 i5-3230 and I installed Linux Mint 16 on it with full disk encryption. It is standard installation with encryption using dmcrypt and LUKS. But there is a ...
1
vote
1answer
338 views

How to regenerate initramfs so it can include bcache module?

Eventually I have converted root-fs into bcache (with the help of blocks). I skipped the step update-initramfs -u -k all because I've been using bcache on other partitions for some time, and I've ...
1
vote
0answers
38 views

Kiwi produces huge initramfs

I'm using Kiwi to build a boot CD based on OpenSUSE 13.1. I want the disk ISO image to be as tiny as possible. I managed to get the read-only filesystem down to only 100MB, but for reasons unknown, ...
2
votes
1answer
383 views

I want to understand Buildroot - the 3 compression config options (kernel, initramfs & rootfs)

I'm using buildroot to generate my images and for sure there is the option of compression with the help of different methods (LZO, LZMA, gzip, ...). So far i found these 3 compression options in ...
3
votes
1answer
628 views

Adding a file to /etc of initramfs in Debian Wheezy

I have added the file /etc/initramfs-tools/etc/motd so that it would be available in /etc of the initramfs environment. However, it does not turn up. This is my second try where I gave the file all ...
5
votes
3answers
3k views

Does initramfs use /etc/fstab?

The way I understand it, initramfs is responsible for loading the "real" root filesystem. Now, there are two places where we define that root. First we put an entry in /etc/fstab. Second, we put the ...
1
vote
1answer
131 views

Using qemu to boot OpenSUSE (or any other OS) with custom kernel

I want to run OpenSUSE as guest with a custom kernel image which is on my host machine. I'm trying: $ qemu-system-x86_64 -hda opensuse.img -m 512 -kernel \ ...
0
votes
1answer
80 views

init 0 process is not starting

Yesterday I have encountered one problem, when I turn on my PC it took a long time to boot. After booting it reached to command line with <initramfs> (It is unknown to me what it is) I thought ...
2
votes
2answers
836 views

busybox initramfs loop mount

I'm trying to loop mount my root filesystem (a loop file) within a busybox initramfs. I try to run the command: mount /rootfs.raw /root ... which works on my Ubuntu laptop, however, I simply get ...
2
votes
1answer
441 views

What is the meaning of the errors from my cpio command?

I have been using the following command on my system to create the .cpio archive to create an initramfs for my embedded target device sudo find . | cpio -H newc -oc > ~/initramfs.cpio This has ...
1
vote
1answer
148 views

Initramfs post-update hook

I need an initramfs hook to call a script after an initramfs has been generated. The Debian Linux Kernel Handbook mentions /etc/initramfs/post-update.d/: Packages for boot loaders that need to be ...
0
votes
2answers
152 views

Passing execution from initrd to real init and issues with missing devices under /dev/mapper

For Gentoo, I am able to (finally) boot my encrypted system with an initrd and LILO. I used the guide at http://whitehathouston.com/documentation/gentoo/initramfs_howto.htm However it appears that ...
5
votes
1answer
167 views

can initramfs be paged out to swap disk?

I am using initramfs to boot Centos via PXE. The initramfs used memory is listed within the "cached" value in /proc/meminfo or via free. Since I need to calculate performance data, I need to know ...
3
votes
1answer
183 views

initrd or ramfs for SLES as /

i would like to boot a SLES and run it out of a ramdisk. I would like to setup machines so that they start PXE boot and as part of the PXE boot process they pull across an image that is the root ...
2
votes
1answer
5k views

Excluding kernel modules through /etc/modprobe.d/blacklist.conf does not work

I don't want to load the kernel module nouveau on my debian box at startup, so I put the following in /etc/modprobe.d/blacklist.conf: blacklist ttm blacklist drm blacklist nouveau I even did a ...
4
votes
1answer
842 views

How can I force a Ubuntu kernel to fail mounting / and drop into the initramfs rescue shell?

I am trying to customize the initramfs rescue environment and would like to force the kernel to fail mounting / and drop into the (initramfs) rescue shell, as opposed to single user mode. How can I ...
1
vote
0answers
179 views

unionfs filesystem

I recently learned about unionfs and aufs and would like to put it to some real use. The scenario I have in mind is the following. Boot a machine with ubuntu on it which will serve as our base. Make ...
4
votes
1answer
645 views

Adding dropbear to initramfs with dracut on Fedora

I'm trying to add dropbear to my initramfs so I can unlock the encrypted disk through a remote SSH session (as described here). I'm running Fedora 16 which apparently uses dracut to generate the ...
4
votes
2answers
688 views

How do I build a read-only Linux system that only writes to the RAM?

This is my current partition structure: Filesystem 1K-blocks Used Available Use% Mounted on tmpfs 127428 0 127428 0% /lib/init/rw udev ...
2
votes
2answers
476 views

Is it a bad idea to not have a swap partition on an embedded linux setup?

I have a small embedded linux kernel and file system created via buildroot that is installed onto a compact flash drive running on an x86 board. I am using an initramfs (due to power loss concerns) ...