How do you remake initramfs?

To repair the initramfs image after booting into the rescue environment, you can use the dracut command. If used with no arguments, this command creates a new initramfs for the kernel currently loaded.

What is Mkinitrd?

DESCRIPTION. mkinitrd creates an initial image used by the kernel for preloading the block device modules (such as IDE, SCSI or RAID) which are needed to access the root filesystem. mkinitrd automatically loads filesystem modules (such as ext3 and jbd), IDE modules, all scsi_hostadapter entries in /etc/modprobe.

How do you create an initrd image?

To create an initrd, begin by creating an empty file, using /dev/zero (a stream of zeroes) as input writing to the ramdisk. img file. The resulting file is 4MB in size (4000 1K blocks). Then use the mke2fs command to create an ext2 (second extended) file system using the empty file.

What is the use of Mkinitrd?

mkinitrd creates an initial image used by the kernel for preloading the block device modules (such as IDE, SCSI or RAID) which are needed to access the root filesystem. mkinitrd automatically loads filesystem modules (such as ext3 and jbd), IDE modules, all scsi_hostadapter entries in /etc/modprobe.

What is a bzImage file?

bzImage. The bzImage is the compressed kernel image created with command ‘make bzImage’ during kernel compile. It important to note that bzImage is not compressed with bzip2 !! The name bz in bzImage is misleading!! It stands for “Big Zimage”.

What is mkinitrd in Linux?

mkinitrd creates an initial image used by the kernel for preloading the block device modules (such as IDE, SCSI or RAID) which are needed to access the root filesystem.

What should not be loaded by mkinitrd?

Do not load any raid modules, even if /etc/fstab and /etc/raidtab expect them. Do not load any scsi modules, including ’scsi_mod’ and ’sd_mod’ modules, even if they are present. If the root partition is on a scsi device, mkinitrd will still include the necessary scsi modules to support that device.

Does mkinitrd include SCSI modules for the root partition?

If the root partition is on a scsi device, mkinitrd will still include the necessary scsi modules to support that device. Load the module module in the initial ramdisk image. The module gets loaded before any SCSI modules which are specified in /etc/modprobe.conf .

What to do if mkinitrd does not detect a module?

Act as if module is built into the kernel being used. mkinitrd will not look for this module, and will not emit an error if it does not exist. This option may be used multiple times.

https://www.youtube.com/watch?v=-aGmEB-iYX0