Its easy, press the hub out from behind (the inner race and balls will most likely come with it), remove the snap ring, press the bearing outer race out from behind, if reusing the hub remove the inner race stuck on it.
Clean it up and press the new bearing in from the front, install the snap ring then press the hub back in. You can also use a grappler but on many salt belt cars its a bigger PITA than its worth, it is easier just to pull the knuckle and press it.