https://notes.manzolo.it/tags/recovery/Recent content in Recovery on Manzolo Code NotesHugo -- 0.152.2en-USSat, 27 Sep 2025 15:36:00 +0200https://notes.manzolo.it/2025/09/linux-boot-repair-debian/ubuntu/Sat, 27 Sep 2025 15:34:00 +0200https://notes.manzolo.it/2025/09/linux-boot-repair-debian/ubuntu/<h1 id="linux-boot-repair-guide-debianubuntu">Linux Boot Repair Guide (Debian/Ubuntu)</h1> <h2 id="introduction">Introduction</h2> <p>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.</p> <h2 id="prerequisites">Prerequisites</h2> <ul> <li>A Debian or Ubuntu live USB/CD (preferably the same version as your system).</li> <li>Access to a live session by booting from the live media and selecting &ldquo;Try Ubuntu/Debian.&rdquo;</li> <li>Basic familiarity with the terminal.</li> <li>Administrative (root) privileges in the live environment.</li> </ul> <h2 id="critical-warning-verify-partitions-before-formatting">Critical Warning: Verify Partitions Before Formatting</h2> <div class="callout callout--yellow" role="alert"> <div class="callout-header"> <span class="callout-icon">⚠️</span><span class="callout-title">Warning</span></div> <div class="callout-content"> <strong>Extreme Caution</strong>: Before formatting any partition, use <code>lsblk</code> or <code>fdisk -l</code> 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. </div> </div> <style> .callout { margin: 1.5rem 0; padding: 1rem; border-radius: 8px; border-left: 4px solid; background-color: var(--callout-bg); border-color: var(--callout-border); } .callout-header { display: flex; align-items: center; font-weight: 600; margin-bottom: 0.5rem; } .callout-icon { margin-right: 0.5rem; font-size: 1.1em; } .callout-title { text-transform: uppercase; font-size: 0.85em; letter-spacing: 0.5px; } .callout-content { margin: 0; } .callout-content p:last-child { margin-bottom: 0; } :root { --callout-blue-bg: #e3f2fd; --callout-blue-border: #2196f3; --callout-green-bg: #e8f5e8; --callout-green-border: #4caf50; --callout-yellow-bg: #fff8e1; --callout-yellow-border: #ff9800; --callout-red-bg: #ffebee; --callout-red-border: #f44336; --callout-purple-bg: #f3e5f5; --callout-purple-border: #9c27b0; } [data-theme="dark"] { --callout-blue-bg: #1a2942; --callout-blue-border: #64b5f6; --callout-blue-text: #90caf9; --callout-green-bg: #1b3a2f; --callout-green-border: #66bb6a; --callout-green-text: #81c784; --callout-yellow-bg: #3a3420; --callout-yellow-border: #c9b382; --callout-yellow-text: #e8d7a8; --callout-red-bg: #2d2020; --callout-red-border: #d48888; --callout-red-text: #e6a8a8; --callout-purple-bg: #2d1b4e; --callout-purple-border: #ba68c8; --callout-purple-text: #ce93d8; } .callout--blue { --callout-bg: var(--callout-blue-bg); --callout-border: var(--callout-blue-border); color: var(--callout-blue-border); } .callout--green { --callout-bg: var(--callout-green-bg); --callout-border: var(--callout-green-border); color: var(--callout-green-border); } .callout--yellow { --callout-bg: var(--callout-yellow-bg); --callout-border: var(--callout-yellow-border); color: var(--callout-yellow-border); } .callout--red { --callout-bg: var(--callout-red-bg); --callout-border: var(--callout-red-border); color: var(--callout-red-border); } .callout--purple { --callout-bg: var(--callout-purple-bg); --callout-border: var(--callout-purple-border); color: var(--callout-purple-border); } [data-theme="dark"] .callout--blue { color: var(--callout-blue-text); } [data-theme="dark"] .callout--green { color: var(--callout-green-text); } [data-theme="dark"] .callout--yellow { color: var(--callout-yellow-text); } [data-theme="dark"] .callout--red { color: var(--callout-red-text); } [data-theme="dark"] .callout--purple { color: var(--callout-purple-text); } @media (max-width: 768px) { .callout { margin: 1rem -1rem; border-radius: 0; padding: 1rem; } } </style> <h2 id="linux-boot-repair">Linux Boot Repair</h2> <h3 id="uefi-boot-repair">UEFI Boot Repair</h3> <p>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.</p>https://notes.manzolo.it/2025/09/chroot-guide-for-debian/ubuntu/Sat, 27 Sep 2025 15:36:00 +0200https://notes.manzolo.it/2025/09/chroot-guide-for-debian/ubuntu/<h1 id="chroot-guide-for-debianubuntu">Chroot Guide for Debian/Ubuntu</h1> <h2 id="introduction">Introduction</h2> <p>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.</p>