Pre-upgrade, Online, Full System Backup Script

Code:
# Become root

sudo su



# Make a list of paths to exclude. 

# Add yours between EOFs, if needed,

cat > /root/fullbackup-excludes.txt << EOF

proc

sys

dev/pts

lost+found

root

var/cache/apt

var/lib/apt/lists

var/log

home/xbian/.xbmc/temp

media

EOF



# Create the backup script

cat > /root/fullbackup.sh << EOF

set -e

echo Making a 'clean' mount of root file system at /mnt/root

mkdir /mnt/root > /dev/null || true

mount --bind / /mnt/root

echo Running the backup chrooted to /mnt/root

chroot /mnt/root tar -cvpf /root/fullbackup.tar --directory=/ --exclude-from=/root/fullbackup-excludes.txt .

echo Unmounting the duplicate root filesystem 

umount /mnt/root

EOF



# Create the restore script

cat > /root/fullrestore.sh << EOF

set -e

echo Making a 'clean' mount of root file system at /mnt/root

mkdir /mnt/root > /dev/null || true

mount --bind / /mnt/root

echo Running restore

mv /root/fullbackup.tar /fullbackup.tar

chroot /mnt/root tar -xvpf /fullbackup.tar

echo Unmounting the duplicate root filesystem 

umount /mnt/root

EOF



# and make them executable

chmod 700 /root/fullbackup.sh

chmod 700 /root/fullrestore.sh



# Now run the backup

/root/fullbackup.sh



echo Backup complete. Backup file is at /root/fullbackup.tar.

echo Now you can upgrade your system. Search forum.xbian.org for instructions.

echo 

echo If the upgrade succeeds, delete this backup with: 

echo     sudo rm /root/fullbackup.tar

echo If it fails, roll back the entire system with:

echo     sudo /root/fullrestore.sh

echo

echo Remember: If Xbian is unable to boot, you can mount the SD card

echo in any Linux computer and do the rollback then.

echo

echo In the future, you can run the backup script directly:

echo     sudo /root/fullbackup.sh

echo 

echo Good luck!



# Exit 'sudo su' so we're not root anymore

exit