Simple rsync-based backup script.

backup.sh

#!/bin/sh

date=$(date "+%Y-%m-%dT%H:%M:%S")

MTPT=/mnt/Backup
SCWD=/root/
BASEDIR=/

rsync -avxzP \
  --delete-excluded --exclude-from="${SCWD}/exclude" \
  --link-dest="${MTPT}/Backups/current" \
  "${BASEDIR}" "${MTPT}/Backups/incomplete-${date}" \
&& mv "${MTPT}/Backups/incomplete-${date}" "${MTPT}/Backups/back-${date}" \
&& rm -f "${MTPT}/Backups/current" \
&& ln -s "${MTPT}/Backups/back-${date}" "${MTPT}/Backups/current"