Troubleshooting on Manzolo Code Notes

Linux Boot Repair (Debian/Ubuntu)

Sat, 27 Sep 2025 15:34:00 +0200

Linux Boot Repair Guide (Debian/Ubuntu)

Introduction

Boot issues in Debian or Ubuntu can prevent your system from starting, often due to a corrupted GRUB bootloader, misconfigured partitions, or kernel problems. This guide provides step-by-step instructions to repair the boot process for both UEFI and Legacy (BIOS/MBR) systems using a live USB/CD. It covers GRUB reinstallation, partition setup, and troubleshooting common issues.

Prerequisites

A Debian or Ubuntu live USB/CD (preferably the same version as your system).
Access to a live session by booting from the live media and selecting “Try Ubuntu/Debian.”
Basic familiarity with the terminal.
Administrative (root) privileges in the live environment.

Critical Warning: Verify Partitions Before Formatting

⚠️Warning

Extreme Caution: Before formatting any partition, use lsblk or fdisk -l to verify that you are selecting the correct disk and partition (e.g., EFI System Partition or root partition). Formatting the wrong partition can erase your data or critical files. Always double-check the disk and partition layout to avoid data loss.

Linux Boot Repair

UEFI Boot Repair

UEFI systems use an EFI System Partition (ESP) to store GRUB and boot files. If the ESP is missing, corrupted, or misconfigured, the system may fail to boot.

Windows Boot Repair

Sat, 27 Sep 2025 15:26:00 +0200

Windows Boot Repair Guide

Introduction

Windows boot issues can prevent your system from starting correctly, often due to corrupted boot files, misconfigured partitions, or firmware settings. This guide provides step-by-step instructions to repair Windows boot problems for both UEFI and MBR/Legacy systems using the Windows Recovery Environment (WinRE) command prompt. It covers partition setup, boot configuration rebuilding, and troubleshooting common issues.

Prerequisites

A Windows installation USB or DVD with the same version as your system.
Access to the Windows Recovery Environment (WinRE) by booting from the installation media and selecting “Repair your computer.”
Basic familiarity with the Command Prompt.
Administrative privileges in the recovery environment.

Critical Warning: Verify Partitions Before Formatting

⚠️Warning

Extreme Caution: Before formatting any partition, use diskpart’s list disk and list part commands to verify that you are selecting the correct disk and partition (e.g., the EFI System Partition or system partition). Formatting the wrong partition can erase your Windows data or other critical files. Always double-check the disk and partition layout to ensure you are not deleting your data drive.

Windows Boot Repair

UEFI Boot Repair

UEFI systems use an EFI System Partition (ESP) to store boot files. If the ESP is missing, corrupted, or misconfigured, Windows may fail to boot.

Windows System Repair and Maintenance

Sun, 05 Oct 2025 15:00:00 +0200

Quick guide to repair corrupted Windows system files using SFC and DISM tools

Chroot Guide for Debian/Ubuntu

Sat, 27 Sep 2025 15:36:00 +0200

Chroot Guide for Debian/Ubuntu

Introduction

A chroot (change root) environment allows you to switch the root directory of a Linux session to a different filesystem, enabling you to work within a broken or inaccessible Debian/Ubuntu system as if it were the active system. This is particularly useful for repairing boot issues, recovering files, updating configurations, or resetting passwords. This guide provides step-by-step instructions to set up a chroot environment from a Debian/Ubuntu live USB/CD.

Network Traffic Analysis with Wireshark (Debian/Ubuntu)

Sat, 04 Oct 2025 13:25:00 +0200

Network Traffic Analysis with Wireshark (Debian/Ubuntu)

Introduction

Wireshark is a powerful open-source tool for capturing and analyzing network traffic, widely used for debugging network issues, monitoring traffic, and security analysis. This guide explains how to install Wireshark on Debian/Ubuntu, capture traffic on a network interface, apply filters, and analyze packets for common protocols like HTTP and TCP. It includes practical examples for troubleshooting connectivity, inspecting web traffic, and identifying bandwidth usage.

Network Traffic Analysis with tcpdump (Debian/Ubuntu)

Sat, 04 Oct 2025 13:35:00 +0200

Network Traffic Analysis with tcpdump (Debian/Ubuntu)

Introduction

tcpdump is a lightweight, command-line packet capture tool for analyzing network traffic on Linux systems. It’s ideal for server environments or quick diagnostics without a GUI, complementing tools like Wireshark. This guide covers installing tcpdump on Debian/Ubuntu, capturing traffic on a network interface, applying filters, saving captures to PCAP files, and analyzing them with tcpdump or Wireshark. It includes examples for monitoring HTTP traffic, debugging connectivity, and remote capturing.