Originally Posted by Perquisitor
I also tried making a backup file per your advice, but got an error because I did not specify where to save the backup file to. I need to learn how to use command lines.
You can easily copy a file without using the command line at all.
For instance if you're using Konqueror, just drag the file icon into the folder where you want to put the copy, then select "copy here" from the popup menu.
That's far easier than trying to copy the file using the command line.