Rescue System

If your system cannot boot, "Enable/disable rescue mode" lets you access the hard disk. 

The rescue system relies on Rescatux. After turning it on and booting, you’ll need to locate the original hard disk first by entering the command below:

lsblk

You should see disk devices, like /dev/sda1, which should align with your disk’s capacity (e.g., 50GB).

Then, just mount the device to a folder, such as /mnt, using:

sudo mount /dev/sda1 /mnt

Make any necessary adjustments.

Once you’re done, disable rescue mode.