Simple tar + rsync backup method

backup-daily.sh

#!/bin/bash
DATE=$(date +%Y%m%d)
FILE="backup-$DATE.tar.gz"
LOG="/tmp/backup-$DATE.log"
RSYNC_PASSWORD="supersecret"
RSYNC_CMD="-a --delete /$FILE rsync://backup-user@backup-server.tld:/backup-dir/daily/"
export RSYNC_PASSWORD=$RSYNC_PASSWORD
cd /
tar -cpzf $FILE \
--exclude=/*.tar.gz \
--exclude=/proc \
--exclude=/tmp \
--exclude=/mnt \
--exclude=/dev \
--exclude=/sys \
--exclude=/run \
--exclude=/media \
--exclude=/var/log \
--exclude=/var/cache/apt/archives \
--exclude=/usr/src/linux-headers* \
--exclude=/home /
rsync $RSYNC_CMD
rm -rf /$FILE