How do I unpack uImage?

The uImage file is simply a wrapper on a file. You convert the uImage file into its original file(s) by simply removing the wrapper (and decompress the file only if the wrapper indicates it).

What is a bzImage file?

The bzImage file is in a specific format. It contains concatenated bootsect.o + setup.o + misc.o + piggy.o . piggy.o contains the gzipped vmlinux file in its data section. The script extract-vmlinux found under scripts/ in the kernel sources decompresses a kernel image.

What is the vmlinuz file?

vmlinuz is the name of the Linux kernel executable. vmlinuz is a compressed Linux kernel, and it is capable of loading the operating system into memory so that the computer becomes usable and application programs can be run.

How extract Initrd image in Linux?

Extraction method:

  1. Create a work directory: # mkdir /tmp/work.
  2. Copy the initrd.img file into /tmp/work: # /boot/initrd-2.6.18-53.el5.img /tmp/work/initrd-2.6.18-53.el5.gz.
  3. Extract the gzip file: # cd /tmp/work.
  4. Extract the cpio archive:
  5. Confirm the directory and files:
  6. Make changes as needed.

What is difference between vmlinux and vmlinuz?

vmlinux: A non-compressed and non-bootable Linux kernel file format, just an intermediate step to producing vmlinuz . vmlinuz: A compressed and bootable Linux kernel file.

How create U-boot image?

Creating a u-boot RAM Disk Image

  1. Create a u-boot target image using the following platform project configure options:
  2. Build the target platform image.
  3. Launch the menuconfig configuration tool for the kernel.
  4. Set kernel options for u-boot support.

How do you use bzImage?

Procedure

  1. Download a new kernel image rpm file to the target.
  2. Examine the boot directory. # ls /boot/ grub vmlinuz.
  3. Review your GRUB configuration. # cat /boot/grub/grub.cfg.
  4. Install or update bzImage.
  5. Confirm the update or install:
  6. Review your GRUB configuration.
  7. Reboot the target.

What is zImage and bzImage?

bzImage is the target used for x86 architectures working with PC BIOS. In contrast, zImage is an architecture-specific target most commonly used for embedded devices and works well with their bootloaders. Copy link CC BY-SA 3.0. Follow this answer to receive notifications.

How do you mount bzImage?

How do I view an initrd IMG file?

How to View, Modify and Recreate initrd. img

  1. Question: How do I view, modify and recreate the new initrd. img on Ubuntu, Debian, CentOS, Fedora, Red-Hat, Arch Linux, or SUSE distributions?
  2. initrd. img is in gzip format. So move initrd.
  3. After unziping the initrd. gz file, the initrd is further in cpio ‘newc’ format.

What is initrd IMG file in Linux?

LINUX supports what is known as an initrd image ( initial rAM disk image). This is a small, +1.5 megabyte file system that is loaded by LILO and mounted by the kernel instead of the real file system. The kernel mounts this file system as a RAM disk, executes the file /linuxrc, and then only mounts the real file system.