¿Cómo se solucionan los problemas de arranque de Linux usando el modo de rescate?

Rescue mode is used to troubleshoot issues with the filesystem mount or boot loader, Make config changes. It is a Minimal Linux Environment where only Single user login is allowed and network connections are disabled.

Rescue mode in Linux serves as a dedicated environment for addressing filesystem and boot loader problems. It enables users to modify essential configurations and perform system recovery tasks in a restricted, single-user access setup, emphasizing local troubleshooting without network connectivity.

To access rescue mode in Linux, methods vary based on your distribution and boot loader. Typically, with GRUB, you can interrupt the boot process by pressing Esc to access the GRUB menu, where you'll find an option for rescue mode. Alternatively, you can utilize a bootable CD, DVD, or USB drive containing a rescue mode image. Adjusting the boot order in your BIOS or UEFI settings may be necessary to prioritize booting from external media for this purpose.

To mount the root partition in rescue mode, follow these steps: Identify the Root Partition: Use fdisk -l to list all partitions and find the device name of your root partition (e.g., /dev/sda1 or /dev/vda1). Mount the Root Partition: Once identified, use mount to mount it to a temporary directory like /mnt: mount /dev/sda1 /mnt Access the Mounted Root Partition: After mounting, access files and directories under /mnt. This allows crucial system file changes or repairs. Mounting the root partition in rescue mode grants access to system files, crucial for troubleshooting and resolving boot issues or system problems effectively.

To chroot into the root partition after mounting it in rescue mode: Mount essential directories like /boot, /proc, /sys, or /dev with mount -a. Use chroot /mnt /bin/bash to switch the root directory to /mnt, allowing you to operate as if in the normal system. Execute commands to diagnose, repair, or configure system issues effectively. Chroot provides full access to system files, crucial for troubleshooting and resolving boot or system problems in rescue mode.