Overview

This is about how to backup for your Ubuntu system

make a U disk that have the backup system
restart shortcut keys-ctrl+alt+delete
F12,select menu→select USB FLASH DRIVE I/O(select U disk)

mount '/home/' fold

mount /dev/sda3 /mnt/custom/sysbak
#using $fdisk -l,we would know detailed infos of disks
#using $fdisk /dev/sda<tab> further know this

using fsarchiver make the *.bak files

fsarchiver savefs /mnt/custom/sysbak/rainbow.fsa /dev/sda2/
#fsarchiver would first pack and compress files in /dev/sda2/ into the rainbow.fsa 
	#and then move to the /mnt/custom/sysbak/ dir

check and make sure the size corresponding to /dev/sda2/ is correct
- ```
cd /mnt/custom/
ls -lh
```

unmount

unmount /mnt/custom/
#unmount not allowed to carry out in the current dir

reboot and remember that we set ./nat.sh