Single-User mode

Inux's Single-user mode Windows-like security mode can be used to change the root password (if not set grub password) and other operations

1. When the countdown starts, press any key

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2. Press the E key to edit the command before starting

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3. Select the second row of kernels and press the E key to enter the editing state

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4. Enter single or S or 1 and then enter

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5. Press the B key to start

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Now that you have entered single-user mode, you can change your system's files and then restart them.

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Single-User mode