I don't have Linux connection, but I've seen people able to play online games with the dualshock 3, it surprised me.. If there's a way to do it, please tell me. I really would be thankful!

I heard there was a way to use the PS3 controller as a wireless mouse. I don't exactly know how, but a guaranteed best answer for someone who can help me out with that along with the answer for the above question.