Change the root password in single-user mode

1. When rebooting or powering on, press any key at the bottom of the 3-second interface.

2. The interface has the following prompt (e edit a change kernel option C command line B start), so we press "E" to edit.

3. Select the second row and press the "E" button to edit

4. Add one of the "singal,s,s,1" to the end of the line, then enter.

5. Press "B" to start.

6. After booting, you can reset the root command with the passwd command.

Change the root password in single-user mode