Soft and Hard Lockups
Detect, troubleshoot, and simulate Linux kernel soft and hard lockups with the watchdog.
Kernel
Linux Kernel Information
Find automation helpers and reference material that streamline Linux administration tasks.
Why Kernel Crash Dumps Are Critical for Root Cause Analysis
Deep-dive on using vmcore crash dumps for postmortem kernel debugging, including real-world kernel bug and OOM workflows.
Enabling Automatic Kernel Crash Collection with kdump
How to automatically enable and configure kdump crash collection on Linux systems using the kdump-enabler script.
Kernel Mode vs User Mode: Privilege Levels and System Call Execution
Deep technical explanation of CPU privilege levels, kernel mode vs user mode execution contexts, system call mechanisms, memory protection, and security implications in the Linux kernel.
Understanding CPU Statistics in Linux (/proc/stat)
Deep technical dive into CPU time accounting in Linux, covering user, nice, system, idle, iowait, irq, softirq, steal, guest, and guest_nice statistics with practical examples and kernel internals.
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