Step-by-step instructions for installation:

1) Install the rsync package (included with most distributions, see
http://www.rsync.org if you don't have it.

2) Install a command line ssh tool (openssh is included with most
distributions too, see http://www.openssh.org if you don't have it).

3) Make sure you can ssh to the remote systems.

4) Install rsync-mirror into /usr/bin if it's not already there.

5) Copy rsync-mirror.example.conf to /etc if there's not already one
there. 

6) Try a trial run:

mkdir /tmp/sourcedata
echo "Some file content" >/tmp/sourcedata/onefile
echo "/tmp/sourcedata/  remotesystem:/tmp/destdata" >>/etc/rsync-mirror.conf
rsync-mirror

	You should now see "Some file content" in the
/tmp/destdata/onefile over on remotesystem.

6) Edit /etc/rsync-mirror.conf to include one line for every directory
that needs to be regularly mirrored.  The rsync-mirror.example.conf
includes some sample lines.