How do I unzip zImage?

How do I unzip zImage?

Put the unpacked files from initramfs_utils. zip into /usr/local/bin. Then simply run ‘repack-zImage.sh -u’ with your zImage in the current directory and it will create a directory named ‘zImage_unpacked’ which contains the unpacked blocks of your zImage.

What is zImage?

zImage: a compressed version of the Linux kernel image that is self-extracting. uImage: an image file that has a U-Boot wrapper (installed by the mkimage utility) that includes the OS type and loader information. A very common practice (e.g. the typical Linux kernel Makefile) is to use a zImage file.

How do I extract Vmlinuz?

Extracting the Linux kernel image (vmlinuz)

1. $ wget -O extract-vmlinux https://raw.githubusercontent.com/torvalds/linux/master/scripts/extract-vmlinux.
2. $ sudo apt-get install linux-headers-$(uname -r)
3. $ sudo yum install kernel-devel.
4. $ mkdir /tmp/kernel-extract $ sudo cp /boot/vmlinuz-$(uname -r) /tmp/kernel-extract/

Where is zImage located?

arch/i386/boot
The file called zImage is the compressed kernel image that lives in arch/i386/boot after you issued make zImage or make boot — the latter invocation is the one I prefer, as it works unchanged on other platforms. If you built a big zImage, instead, the file is called bzImage, and lives in the same directory.

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.

What is vmlinuz in Linux?

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 do I start 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.