Tutorial
Start here:
http://www.ladyada.net/learn/avr/avrdude.html
The AVRDude writeup
http://www.cs.ou.edu/~fagg/classes/general/atmel/avrdude.pdf
Hope that helps
Edited on 2/23/2014 at 4:02 PM. Reason:
A vaper without a multimeter is like a mechanic without a wrench