I realized the distinction between thinking and knowing. You must understand that even though you have the eighth wonder of the world right under your fingertips, you must learn to work the damn thing. Help I found that help was probably the worst nightmare of all. This command lets one see the space left on his devices, as well as a few other properties. Devices are another term the inexperienced user is not familiar with.
Devices is the floppy drive, cd rom drive, hard drive ect.
If one type df, it shows how much space is occupied on the devices, and how much is free. But to me this was just a bunch of numbers. It seems to me that the only way one can learn the basics is from another human being or a book. Thus I recommend that the first thing you do after you buy the Linux CD is to locate a friend with extensive knowledge of the Linux operating system, and invite him over for several cups of coffee or some other caffienated drink. Linux also has this great feature that allows remote access to your computer.