I use rsync with cron to backup ISGSP.net and these
technical notes each night to a backup server (Solaris\sparc 8 with a tape
drive).
By default, rsync uses the ssh protocol to do a remote copy (rsync is a
secure replacement for rcp), therefore we need to make sure
ssh and keychain are avalible on this host. keychain
will give cron passwordless login to the remote host.