Austrian Soldier, c. 1910.
Given this man's short sword (instead of a bayonet) and high jackboots (instead of ankle boots), I think this is an artillery private. If so, his tunic would be dark brown with red facings. The cap is gray. The pants should be light blue, but here they look like some other dark color to me.
Click here for a larger view, or here for a close up of the cap badge.
Page by Mark Conrad, 2004.