Serial Port it's unable

Hey!!! I’m a begginer in arduino and i’m traying to connect it to my computer, but when I go to ‘Tools’ of IDE and search for Serial Port I discover that’s unable, so I can’t connect my arduino. I’m working with Linux Ubuntu 14.04

I attached two IMG. As you can see in the first IMG the Serial Port is disable, and in the secon IMG you can see how my comupter detect my arduino like ‘’ ttyACM0: USB ACM device ‘’

Do somebody know how I can do to map this device to Serial device? Thanks!!!


Thanks a lot for your attenshino, but now, it works, I don't know how but it works :slight_smile: