Recovery

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. ...

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. ...