I have Ubuntu 12.10 and a Samsung Galaxy Tab 2 7.0 How can I use my desktop to back up my tablet? I tried to call Samsung support earlier, but they wanted $200 for their tech support!
short answer: install the rsync deamon on your linux box, then install the rsync tool of your choice on your tablet and then run the backup from the Android device.
3.2 on your Linux box type ifconfig and identify your relevant ip-address
3.3 fire up the "rsync backup for Android" on the small device, click [menu] and then [add profile]
3.4 there you fill out all the details (including the ip-address of the Linux box and the rsync options (you might want to consult the man pages, but -av is probably what you need). Then click [Save profile]
3.5 execute the backup from the device
PS: optional: configure your Linux box to use a fixed ip-address
... total cost $0.00