USB webcam linux

Hello,
I am wanting to use a USB webcam instead of the built in one, I currently have XUbuntu (latest) installed.

Any advice on doing this?

Thanks in advance,
Ryan

EDIT: ----

Code:

$ dmesg | grep usb
[    3.955946] usbcore: registered new interface driver usbfs
[    3.956011] usbcore: registered new interface driver hub
[    3.956128] usbcore: registered new device driver usb
[    3.968425] usb usb1: configuration #1 chosen from 1 choice
[    4.074102] usb usb2: configuration #1 chosen from 1 choice
[    4.181259] usb usb3: configuration #1 chosen from 1 choice
[    4.286381] usb usb4: configuration #1 chosen from 1 choice
[    4.409566] usb usb5: configuration #1 chosen from 1 choice
[    4.857123] usb 5-5: new high speed USB device using ehci_hcd and address 2
[    5.025845] usb 5-5: configuration #1 chosen from 1 choice
[   13.581636] input: USB 2.0 Camera as /devices/pci0000:00/0000:00:1d.7/usb5/5-5/5-5:1.0/input/input8
[   13.603639] usbcore: registered new interface driver uvcvideo
[ 9357.249138] usb 1-2: new full speed USB device using uhci_hcd and address 2
[ 9357.456977] usb 1-2: configuration #1 chosen from 1 choice
[ 9357.565234] usbcore: registered new interface driver pac7311
[10201.152164] usb 1-2: USB disconnect, address 2
[10212.945143] usb 1-2: new full speed USB device using uhci_hcd and address 3
[10213.154118] usb 1-2: configuration #1 chosen from 1 choice