Backup linux server via rsync to remote backup NAS drive

rsync_server_backup.sh

#!/bin/sh

# Backup linux server via rsync to remote backup NAS drive
#
# Run this from a root cronjob at whatever intervals you need
#
# example:
# # backup server at 4am
# 0 4 * * * sh /root/rsync_server_backup.sh > /dev/null;
#
#
# SERVER MUST HAVE ROOT SSH KEYS SHARED ON BACKUP SERVER FOR RSYNC TO WORK
#
# Created by Brandon Simpson
# Last updated: May 29, 2013

if (( EUID != 0 )); then
    echo "You must be root to do this." 1>&2
    exit 1
fi

START=$(date +%s)
TIMESTAMP=$(date '+%F-%H%M%S')

REMOTE_SERVER=“<remote server ip>”
REMOTE_BACKUP_FOLDER="/volume1/Backup/linux_backups/$(hostname)"
REMOTE_USER="root"

# -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)
# -A, --acls                  preserve ACLs (implies -p)
# -X, --xattrs                preserve extended attributes
# -H, --hard-links            preserve hard links
# -z, --compress              compress file data during the transfer
# -v, --verbose               increase verbosity
# --delete-after          receiver deletes after transfer, not before
# --delete-excluded       also delete excluded files from dest dirs
# --dry-run               perform a trial run with no changes made


# execute rsync command and exclude paths
rsync --archive --hard-links --human-readable --inplace --numeric-ids --delete --delete-excluded --verbose /* $REMOTE_USER@$REMOTE_SERVER:$REMOTE_BACKUP_FOLDER --exclude={/dev/*,/proc/*,/sys/*,/tmp/*,/run/*,/mnt/*,/media/*,/lost+found,/home/*/.gvfs,/var/spool/postfix/*,/var/log/*,/var/lib/php/session/*,/var/lib/pacman/sync/*,/var/cache/*,/var/run/portreserve/*}


FINISH=$(date +%s)
echo "total time: $(( ($FINISH-$START) / 60 )) minutes, $(( ($FINISH-$START) % 60 )) seconds"