Linux Dummies 9th

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Part V: The Part of Tens
Linux allows you to use spaces and other characters in filenames that you
may or may not be able to use in filenames on other operating systems.
However, some Linux applications may stumble when they encounter file or
directory names containing spaces. Usually it’s a safe bet to stick with alphanumeric
characters and avoid spaces and odd characters (such as question
marks and exclamation points).
And here’s a bonus, all-purpose troubleshooting tip for an all-too-common
situation . . . .
“Aaargh! I Forgot My Root
Password! What Do I Do?”
Fear not — you have a way around this problem! You need to boot into singleuser
mode, which you can accomplish as follows:
1. Reboot your machine.
2. When you see the blue screen with the words Press any key to
enter the menu, press a key.
It doesn’t matter which key you press at this point.
3. At the GRUB boot screen, press E.
A configuration file opens.
4. Use the arrow keys to go to the line starting with kernel.
5. Press E to edit the kernel line. At the end of the line, add the word
single.
6. Press Enter to put the change into place, and then press B to boot the
machine.
7. Type passwd and then enter the new password twice as directed.
8. Type exit and then boot the machine normally.