Thanks.  I found the info I needed under the FAQ, and I think I am in good shape now.  I am going to need to learn a bit more at some point in the future -- I started off by specifying the wrong name for the backup directory so I got an error when I tried to do a backup.  I tried to delete the jobs the script had set up so that I could run the script again but couldn't figure out how to do it.  Rather than spend time on Google looking for the answer, I took the easy way out -- I renamed the directory.  Some day, however, I really should learn how to manage things better.

Thanks again to both of you for your help.