Administration on Samuel Matildes - Knowledge Base

Linux Boot/Shutdown Quick-Analyzer

Mon, 01 Jan 0001 00:00:00 +0000

What is Linux Boot/Shutdown Quick-Analyzer and why do you need it?

The Linux Boot/Shutdown Quick-Analyzer is a Python script that analyzes Linux boot and shutdown logs.

It makes it easy to find boot and shutdown events in system logs, providing information such as the number of boot and shutdown events, along with the timestamp, filename, and line number for each event.

How to run it

You need to have Python 3 installed on your machine.

How Antivirus Software Can Prevent Linux Boot: Troubleshooting Guide

Fri, 31 Oct 2025 00:00:00 +0000

Understanding Antivirus Boot Interference

Antivirus software, while crucial for system security, can sometimes interfere with the Linux boot process. This occurs when security modules become overly aggressive during system initialization, potentially causing boot failures, readonly filesystem mounts, or service startup issues.

Common Symptoms

System fails to boot completely
Filesystem mounts as readonly (ro) instead of read-write (rw)
Critical services fail to start
Boot hangs at specific points
SELinux/AppArmor policy violations during boot

Filesystem Readonly Issues

One of the most common problems occurs when antivirus software causes the root filesystem to mount readonly. This prevents the system from writing critical boot files and can halt the initialization process.

How to Troubleshoot Linux Performance — Field Playbook

Tue, 19 May 2026 00:00:00 +0000

A field-ready reference for Linux performance investigations — keep it open in a second terminal.

How to use this playbook

Linux performance problems split cleanly into two very different investigations, and picking the wrong one wastes hours:

Situation	Track	What you do
The problem is happening right now (or you can reproduce it on demand)	Track A — Live Triage	Interactive tools, sample at 1s intervals, follow the bottleneck
The problem is intermittent / random (happens overnight, once a week, only under load you can’t reproduce)	Track B — Background Collection	Arm continuous loggers before the next occurrence, then mine the logs afterwards

Rule of thumb

If you can’t reproduce it, do not keep staring at top. Stop, deploy collectors, walk away, and analyse later. Otherwise you’ll miss the event every single time.

Understanding IO Delays in Linux - Performance Testing with io-delayer

Wed, 07 Jan 2026 00:00:00 +0000

GitHub • Linux Kernel Module

Simulate and analyze IO performance degradation at multiple kernel layers to understand system bottlenecks.

Why IO Delays Matter in System Performance

Input/Output operations form the backbone of system performance, yet they represent one of the most complex and often misunderstood aspects of Linux performance engineering. When applications experience slowdowns, the root cause frequently traces back to IO delays introduced at various kernel layers.

How to Analyze Linux sosreport and supportconfig with SOSParser

Tue, 06 Jan 2026 00:00:00 +0000

GitHub • Docker Hub •

Parse, analyze, and understand Linux diagnostic reports with automated intelligence.

What is SOSParser?

SOSParser is a powerful web application designed to automatically parse and analyze Linux sosreport and supportconfig diagnostic files, converting them into comprehensive, interactive HTML reports. Created to streamline the often tedious process of manually reviewing system diagnostic data, SOSParser transforms raw diagnostic archives into structured, searchable insights that accelerate troubleshooting and system analysis.

How to Benchmark Linux with Tux Toaster

Fri, 17 Oct 2025 00:00:00 +0000

GitHub • PyPI

Benchmark smarter, not harder — with Tux Toaster.

What is Tux Toaster?

Tux Toaster is an all-in-one performance toolkit for Linux. It triggers various load tests (“toasters”) to help you evaluate the performance and stability of your system across CPU, memory, disk, and network. It offers an interactive terminal menu with multi-select support and clear, stoppable workloads.