Kernel & System Internals

Notes on the Linux kernel, crash analysis, kdump, performance tuning, and sysctl.

• Add audit rule to track modifications to HugePages settings

• Add audit rule to track modifications to HugePages settings

• Adding Selinux=0 Into The Grub Kernel Command Line

• Basics Of Crash Analysis Guide

• Check Kernel Driver For Gpu Command

• Check The Major And Minor Faults In The Sar Report

• Command To Clear Out Dmesg Logs

• Command To Reserve Hugepages For Dpdk Use

• Difference Between dracut and dracut-ng Repositories

• Dis Command In The Crash Utility Helps To Disassem

• Dmesg T

• File name

• Good Command For Reloading The Kernel When Modules

• Good Example To Use Awk In An Strace

• Good Steps to Check if Certain Patches are Available in a Particular Kernel

• Good Way To Check For Oom Killer Messages In Dmesg

• How Create A Vmcore Dump

• How Find System Information From The Crash Utility

• How Kernel Entropy Works

• How List All Kernel Parameters

• How Show Contents Of Initramfs Image

• How To Build Crash With Lzo Support

• How To Check If An Iso Is Uefi Or Legacy Bios Boot

• How To Check If Kernel Parameters Have Been Added

• How To Download The Kernel In Its Entirety And Go

• How To Permanently Set Kernel Parameters

• How To Set Kernel.Sched Rt Runtime Us= 1 In The Ke

• How to Check for the Currently Installed Kernels with grubby

• How to Check the Default Kernel in Use with Grubby

• How to Collect Logs of a Kernel Crash that Happens Very Early in the Boot Process

• How to List the Tainted Modules Using the crash Utility

• How to Spread a SoftIRQ Load Across Multiple CPUs

• How to Unpress an initramfs Image

• If Receive Cannot Build Against Kernel Version 6.1

• If Someone Refers To Kernel Headers

• If Unable to Connect Via ssh to a FIPS System After Updating the Kernel

• If You Observe a GRUB Issue Surrounding GRUB Configuration was Not Updated

• If a Kernel Panic Occurs Due to a BMC Restart Analysis

• Initramfs Explanation

• Insight into the RT Kernel Changelog

• Kdump And Introduction To Vmcore Analysis By Red H

• Kernel & System Internals

• Kernel-space and User-space Incompatibility in Linux

• Linux Kernel panic issue: How to fix hung_task_timeout_secs and blocked for more than 120 seconds problem

• Open and read the SAR file

• Print a well known symbol in hex

• Priority Inheritance in the RT Kernel

• Reasoning Why the RESF Doesn’t Build Some Kernels Inbetween and Only Builds the Latest Kernel

• Reasons Why GRUB Does Not Regenerate if the Packages are Updated

• Regarding the transparent_hugepage Kernel Option

• Sar Meaning System Activity Reporter

• Strace Numbers Are Shown In Seconds

• The Linux Kernel Crash Book

• The Sym Command In Crash

• To Only See Linux Kernel Logs, Run

• Tuning A Real Time Kernel

• Tuning IRQ Balancing

• Use Strings Command To Check The Vmcore File

• Useful Dmesg Commands

• Useful Way To Troubleshoot Crash (Alongside Copilo

• Useful strace Command for Capturing the Output of a File

• What Is /boot/efi/EFI/BOOT/fbx64.efi?

• What is the grub2-pc Package?

• When Tuning Kernel Parameters, If There Are 2 Or M

• Why Dates Do Not Match up in a Kernel Source Tree

• ksoftirq Discussion on the Nvidia Forums

• 📁 memory.stat

• 🔍 What dis -l Does in crash