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)
- $ wget -O extract-vmlinux https://raw.githubusercontent.com/torvalds/linux/master/scripts/extract-vmlinux.
- $ sudo apt-get install linux-headers-$(uname -r)
- $ sudo yum install kernel-devel.
- $ mkdir /tmp/kernel-extract $ sudo cp /boot/vmlinuz-$(uname -r) /tmp/kernel-extract/
Where is zImage located?
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?
- Download a new kernel image rpm file to the target.
- Examine the boot directory. # ls /boot/ grub vmlinuz.
- Review your GRUB configuration. # cat /boot/grub/grub.cfg.
- Install or update bzImage.
- Confirm the update or install:
- Review your GRUB configuration.
- Reboot the target.