This question is asked many times but I haven't got the right answer.
What I want is to create a partition where I backup my current Ubuntu partition that appears in the GRUB menu. If one day my Ubuntu won't to start I lunch the backup partition and voila my system is restored.
Currently I use CloneZilla but the problem is I must have always on me a usb key that contains CloneZilla.
EDIT:
df -h
/dev/sda5 55G 39G 14G 74% /
none 4,0K 0 4,0K 0% /sys/fs/cgroup
udev 997M 4,0K 997M 1% /dev
tmpfs 202M 1,2M 200M 1% /run
none 5,0M 0 5,0M 0% /run/lock
none 1006M 8,0K 1006M 1% /run/shm
none 100M 36K 100M 1% /run/user
parted -l
nothing