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Questions tagged [initramfs]

initramfs contains the initial root filesystem in a cpio archive. The archive is unpacked and loaded into RAM in order for the OS (usually Linux) to boot as part of the startup process.

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How to disable Nouveau kernel driver on CentOS

I am installing CUDA on my GPU machines. While at it, I need to disable Nouveau Kernel Driver. I did find a solution here: https://askubuntu.com/questions/841876/how-to-disable-nouveau-kernel-driver But update-initramfs is not found on CentOS. I…
user1051505
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Trouble Booting Custom Kernel with QEMU: dracut-initqueue timeout waiting for /dev/sysvg/root

I am trying to boot a custom Linux kernel using QEMU and encountering an issue where the boot process hangs with a dracut-initqueue timeout. I compiled the kernel using a .config file from a Fedora VM and also copied the initrd.img from the same…
isomorphik
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initramfs ipconfig vs networking dhclient DHCP request using different parameters

I have a dropbear setup that allows me to remotely ssh and unlock the encrypted luks volumes holding the root filesystem. This involves first a DHCP request by initramfs to get an IP address, and later another DHCP request after the system has…
ealfonso
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Boot-Up logo is not getting diplayed on embedded linux kernel 5.4.31

I'm currently working with an STM32MP octavo board, specifically the OSD32MP1-BRK model, which is running an embedded Linux kernel version 5.4.31. As part of my project, I'm attempting to display a bootup logo on the device's screen. Currently,…
Hamza Khalid
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How do I best instrument the Linux kernel to log early boot file open/read requests?

I'm looking for a relatively quick and straightforward way to have the Linux kernel print to console/serial (via printk - I can find a way to capture the output) any meaningful I/O requests on the early (rootfs/tmpfs/initramfs) filesystem.…
user3325588
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printing with printf in /init

I am playing with linux booting for educationl purposes. Here is my micromalistic init program: #include int main () { printf ("hello\n"); while (1) { } return 0; } Compiled with gcc -static init.c -o…
exebook
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Yocto - initramfs image: "The recipe is trying to install files into a shared area when those files already exist..."

I want to build an initramfs image unfortunately I get error "The recipe texas-image-initramfs is trying to install files into a shared area when those files already exist" every time. I tried the bitbake -c cleanall commands for both texas-image…
grandzello
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Unlocking multiple LUKS-encrypted volumes with a single password at boot (Gentoo, encrypted ZFS root, genkernel initramfs)

With this post I am sharing a solution with the community. I have a Gentoo system installed on a ZFS pool consisting of multiple encrypted devices. It is normally decrypted at boot as described in this post. In the file /etc/default/grub I add to…
D-FENS
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Kernel panic - not syncing: Requested init /init failed (error -2)

Attaching a bit more of the boot log. HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages HugeTLB registered 64.0 KiB…
rish_1n4
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initramfs-tools in buildroot

I am using initramfs-tools hooks to run custom commands during pre-boot or post-boot on Ubuntu. (https://manpages.ubuntu.com/manpages/xenial/man8/initramfs-tools.8.html) Now I want to try same thing for my embedded device running Linux in buildroot…
linux.universe
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Getting a panic at populate_rootfs with bigger initramfs

I'm using buildroot with initramfs. And it is working fine with uImages smaller than 14M. But when I add packages and get bigger, this kernel panic occurs. Kernel command line: noinitrd ramdisk_size=30720 console=ttyS0,115200n8 oops=panic panic=10…
varta
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How can I run a program on a tty?

I need tty interactive on onboot of linuxkit. Now, setsid -w agetty -a root -L 38400 ttyS0 vt100 is working. But I want to run a specific program. Is there a way? Thanks to "Mahdy Mirzade" for reply, $ setsid sh -c 'exec ls <> /dev/tty2 >&0…
user212942
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Facing kernel panic issue with Yocto: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

Scenario: I am working in Yocto linux project. I have created my own rootfs with tar.gz extension. And I have built linux kernel (using bitbake linux-kernel-rt). I am not able to load kernel and rootfs. Can anyone explain what can be the…
Sarveshk
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How early can I send data to a serial port on Linux boot?

I have an external serial peripheral that needs to be setup on Linux boot, on an embedded system. What I need is sending a short configuration string as early as possible during system boot, so my procedure is simply Set port to 115200 bps Send a…
LuC
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How to run custom program in initramfs

I have built initramfs which I want to use for setting up dm-verity. For testing purposes I don't switch_root and after boot it stays in initramfs. However I need the tool veritysetup. I have it precompiled and copied to /usr/sbin on initramfs, but…
boomvoyage21
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