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Over the past few days, some of our readers have reported a Fedora Grub kernel panic.

Linux is used all over the computer world. You still have one of the most common uses of Linux today if you choose not to recognize it. After learning all about Linux, you will realize that it is in fact often the kernel. The kernel is the main element of the Linux operating system (OS) and is responsible for the communication between the hardware of a particular computer and its processes.

In this article, you will learn about a situation typical of the Linux kernel: kernel stress. The term itself can put pressure on you and cause panic, but if you have the right preparation, it can calm you down. Every approach administrator has a problem with this, at least because of their careers, but reinstalling the system shouldn’t be the first decision you should move towards.

What Is A Panic Core?

The core of stress and panic is one of the many dilemmas of booting Linux. Essentially, it is a dilemma where the kernel cannot boot properly and the system fails to boot. The kernel is not directly detected during the boot process. Instead, initramfs is loaded into the Then ram, points to the kernel ( vmlinuz ), and then loads the operating system. If the initramfs gets corrupted or removed at this stage due to new operating system fixes, updates and / or other reasons, then we will simply face kernel panic. We

If we delve deeper into boot technology, we run into the “chicken and egg problem” in Linux.

If the Linux system process starts after moving the Master Boot Record (MBR), GRUB is loaded. The kernel must be loaded into RAM to boot the operating system, but the kernel is on top of the hard drive ( / boot / vmlinuz ) and the hard drive is not yet mounted due to / … Without mounting it is impossible to access any file, not even the kernel. To overcome this, load initramfs / initrd directly into RAM and add a read-only / boot section. It will then connect the hard drive to this / section and the process will continue. LS

# -lrth / boot /

This process emphasizes the importance given to initramfs / initrd during the Linux boot process.

Why Can Panic Attacks Occur? ra?

1. If it is obvious that the initramfs file is corrupted.
2. If initramfs was not built correctly to support the specified kernel. Each kernel version has its own initramfs .
3. If the installed kernel is not supported or does not work correctly.
4. If there were errors in the latest fixes.
5. When a device was installed on the network or from another source, but the initrd image was not created with the last module installed.

What About Troubleshooting?

The first thing to do after detecting a kernel panic error is not to panic now that you know it is attached to an image file associated with someone else’s error.

Step 1. Boot the system in normal mode with the specified best kernel version.

Press the Enter key or several times and you will see the following:

Step 2. Restart your computer and select a recovery request.

We don’t have this service in RHEL 6 or earlier, but in RHEL 7 and later, most of them have a built-in recovery image.

Step 2.1. GoPut in / boot and list all files. Here you can see that there is a initramfs file for your kernel, there is a initramfs file to save you on boot your system, and another one for kdump .

Step 3. You really need to create a new initramfs file corresponding to your kernel version.

#uname -r

#dracut -fahrenheit

3.3) List the elements of the / boot directory again. A initramfs file will now be created for the appropriate kernel.

Step 4. Now, if the person boots normally, your computer will boot without a kernel error.

Step 5. The situation may still arise if, in addition to creating a new initramfs file, you create an emergency image on your system where your company was unable to create a new file. because it has already been done.

In this step, we need to create a initramfs image using either mkinitrd or dracut command.

Step 5.1. Check your kernel version first with this special uname -r command.

Step 5.2: run mkinitrd load withparameter --force and kernel specification:

#mkinitrd --force

Your initramfs file will be restored without any problems thanks to these short steps, and now anyone can start your operating system without your errors.

Resume

Now that you see this kernel panic, you certainly don’t worry, because you know why this error happened and how to fix it. This statement addresses one of the most common Linux migration issues – kernel panics. There are many other potential boot problems you may encounter on Linux, but solving these problems will cause less panic once you gain some additional knowledge about your system.

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FIX: Fedora Grub Kernel Paniek
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