I got a MBWE2 a week ago or so with "improvement" in mind. After getting ssh access using Martin Hinner's hack, I did the following to turn the MBWE into a rsync server:
Add the following line to /etc/services:
rsync 873/tcp
Add the following to /etc/inetd.conf:
rsync stream tcp nowait root /usr/bin/rsync rsyncd --daemon
You'll also need to edit /etc/rsyncd.conf to your liking. Check the rsyncd.conf man page for details.
An example which makes the whole of the MyBook shared disk available is:
[share]
comment = "MyBook share directory"
path = /shares/internal/PUBLIC
uid = www-data
gid = www-data
list = true
use chroot = no
read only = no
n.b. This only applies if you are connecting directly to rsyncd (i.e. via port 873). If you intend to rsync over ssh which I believe is the default for rsync, none of the above is required, if you have ssh access, you can rsync to it like below without any further modifications!
rsync -az source user@host:directory
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1. Just a note, OptWare has rsync-3.x available to install (firmware 1.x ships with rsync-2.x I believe) — mallchin
2. Indeed, rsync-3.x is much more memory efficient, see here, and thus great for the memory-limited MBWE. Also check the discussion in rsnapshot-based-backup-server — gpapan.