What should I do if I forget the root password on Arch Linux?

If you forget the root password for Arch Linux, you can reset it by following these steps:

1. Reboot the computer and select Arch Linux during the booting process.
2. Press any key on the keyboard when you see the guiding menu to stop the automatic guidance.
3. Select to boot into recovery mode from the boot menu.
4. You will enter the terminal interface in recovery mode.
5. Enter the following command in the terminal to mount the root file system:
6. Please remount the root filesystem as read-write.
7. You can now use the following command to change the root password:
8. change password
9. Enter a new root password and follow the prompts to confirm.
10. After changing the password, you can restart the computer using the following command:
11. restart

The computer will restart and you will be able to log into Arch Linux with the new root password. Make sure to remember the new password to avoid forgetting it again.