maybe was stationed in Sarajevo - so look on map about the symbols what was possible. see some Infantery, also Husars, Train, Artillery and so on: http://www.kuk-wehrmacht.de/regiment/img/oegarnkart1898.jpg
here some pictures:http://www.kuk-wehrmacht.de/regiment/index.html
my guess would maybe Landwehr-Infanterie - not easy to find fitting with hat, trousers and sleeves. some possibilities also with the knots on the sleeves: http://www.kuk-wehrmacht.de/img/oe1898_07.jpg
KuK Austrian-Hungarian Troops - not possible for him is HONVED (Hungary): http://de.wikipedia.org/wiki/Liste_der_k.u.k._Kampftruppenhttp://de.wikipedia.org/wiki/K.k._Landwehr
i have no idea what can be meant with his home-town- ?Lelo Ljuba? must be a misspelling...