here is a script I have used, create a file in any editor (i use vi) and type in the following replacing with your user, password and domain info.
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#!/bin/sh
lftp user
assword@yourdomain <<EOF
mirror -e -n serverdirectory yourdirectory
bye
EOF
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the -e -n will only get changed files and remove files that are no longer on the server
save it as yourfilename, chmod 755 yourfilename
then type the filename in a terminal and away you go....
I placed mine in a cron to run every day as to have a current offsite backup......that i dont have to run myself it runs on its own and uses very very little resources.....
