Backup

Backup and restore hard drive with “dd”

Look for the hard drives device with mount or sudo fdisk -l and unmount it. In my case it's going to be sda.

Backup uncompressed image:

sudo dd if=/dev/sda of=/home/sda.bin bs=1024

Delete backups after rpi-update

After installing rpi-update:

sudo apt-get update
sudo apt-get install rpi-update

And doing an update of the firmware and the kernel with it:

sudo rpi-update