for year in `seq 2006 2010`
do
	for month in `seq 1 12`
	do
		echo $year $month
	done
done

This script gives a list of year month combinations from 2006 to 2010.
Also have a look at [cal](http://en.wikipedia.org/wiki/Cal_(Unix)), if you are doing something with dates.

Tags: seq, year, month, bash, loop, for

Iterate through years and months

Bash