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How to recover from a root password loss in a Linux machine if you are using GRUB as the boot loader.
What is this Tip?

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This tip will help you to reset the root password in a Linux machine. This tip is relevant only if you are using GRUB as your boot loader.
How to implement this Tip?

1. Switch on your Linux Machine.

2. At the GRUB boot screen, press e to access boot parameters. Select the line for the kernel for which you want to boot into and type single at the lines end.

3. Press Enter to exit the edit mode and from GRUB screen press b to boot into single user mode as root.

4. Now you can change the existing root password by using the passwd command.