Flashybrid

http://hacks.slashdirt.org/sw/flashybrid/

apt-get update
apt-get install rsync
wget http://hacks.slashdirt.org/sw/flashybrid/flashybrid_0.21_all.deb
dpkg -i flashybrid_0.21_all.deb

/etc/default/flashybrid:

# This file controls the flashybrid init script.

# Whether to start flashybrid on boot, and shut it down on shutdown.
# This has the potential to break your system if it is turned on, so
# make sure you understand flashybrid, and have configured it for your
# system, before turning this on.
ENABLED=yes

# Whether to display a message before a directory is synchronized or not.
VERBOSE=yes