Ok, now it worked after I typed it over a couple of times. I'm going to try what you said about the editor now.
C

Linux is case sensitive. Is it possible you entered all or part of the password in upper case? or some mix of upper and lower case?

You have to exactly match what ever you did when you installed.

Ok, got past that after typing the password a couple of times.
Next I typed in:

[root@localhost rules.d]# nano 65-libsane.rules
bash: nano: command not found...
[root@localhost rules.d]# nano 65-libsane.rules
bash: nano: command not found...
[root@localhost rules.d]#

You can see the results.
Is nano an application? Am I supposed to be doing the typing somewhere else?
C

This means you do not have the editor on the system. Do you have one you know how to use?

If yes, use it. If not, the vi editor is always there. So, 'vi 65-libsane.rules' should open the file. Be warned, vi is not very easy to use as a novice. Any editor you now know how to use is going to be easier.

Ok, something happened when I typed in 'vi 65-libsane.rules'!
There's a blinking curser, then lots of little lines and at the bottom it says "65-libsane.rules [new file]!

What next?
C

So, what we know, the file did not exist, and now you are creating it.

As I said above, vi is not easy to use. I'm going to post a link to a How To document, to help you with vi.

This is the link -->https://www.washington.edu/computing/unix/vi.html

Spend a few minutes and look at the document. You need to be able to Open a file, change modes, enter text and save the file. There are instructions for other, more complex editing tasks, you can by pass them for now. See if you can enter the data, as I posted, and save the file in the directory you changed into. It needs to be there so udev can read it.

This, I think is the best way for you to edit the file. I only use vi when there is no other choice. I'm sure there is some editor on your system that is easier. You can look into that when you are not fighting with some problem.

Ok, thank you for the link Cliff.
I have to go home now, but when I get back to Dad's next week I will implement what you said with the vi editor.
[I wouldn't know if one was easier to use than another - I haven't used any at all]
Smiles!
Carla
Thanks!