Backup to external drive

#!/bin/bash

set -e
set -x

LABEL=Backup201803
DEVICE=/dev/disk/by-label/${LABEL}
MOUNTPOINT=/mnt/${LABEL}

# first check to see if drive is present

if [ ! -b ${DEVICE} ]
then
        echo "external backup drive ${LABEL} not present"
        exit 1
fi

# mount it if needed

if [ ! -d ${MOUNTPOINT}/backup/orifice ]
then
        mount ${DEVICE} ${MOUNTPOINT}
fi

if [ ! -d ${MOUNTPOINT}/backup/orifice ]
then
        echo "mount failed"
        exit 1
fi

# now backup to it

time rsync -av --one-file-system / /mnt/${LABEL}/backup/orifice/