Simple script for automatic backup using duplicity

simple-duplicity.sh

#!/bin/bash

BACKUP_SCRIPT=${0##*/}
DUPLICITY="/usr/bin/duplicity"
DATE="/bin/date +%R-%d-%m-%y"

BACKUP_COMMAND="$DUPLICITY --exclude=/media/backups --exclude=/home/piotr/.cache --exclude=/home/piotr/.thumbnails --exclude=/home/piotr/.gvfs --exclude=/home/piotr/.xsession-errors --exclude=/home/piotr/.recently-used.xbel --exclude=/home/piotr/.recent-applications.xbel --exclude=/home/piotr/.Private --exclude=/tmp --exclude=/proc --exclude=/sys --exclude=/home/piotr/.local/share/Trash --exclude=/home/piotr/muzzik --exclude=/home/piotr/filmy --exclude=/home/piotr/.beagle --exclude=/home/piotr/.opera --exclude=/home/piotr/.thumbnails --exclude=/home/piotr/.VirtualBox --exclude=/home/piotr/.cache --exclude=/home/piotr/downloads --include=/home/piotr --exclude=** --no-encryption / file:///media/backups --volsize=250 --archive-dir=/home/piotr/.cache/deja-dup"

# Sanity checks
if test -z "$BASH" ; then
   printf "$DATE \n$BACKUP_SCRIPT:$LINENO: please run this script with the BASH shell\n" >&2
   exit 192
fi
if test ! -x "$DUPLICITY" ; then
   printf "$DATE \n$BACKUP_SCRIPT:$LINENO: the command $DUPLICITY is not available - aborting\n" >&2
   exit 192
fi

# Create an incremental backup if the portable drive is connected
if test -d /media/backups ; then
    printf "\n\n\n\n\n`$DATE` \nBacking up!\n-------------------------------------------------\n"
    $BACKUP_COMMAND
else
    printf "`$DATE` \n$BACKUP_SCRIPT:$LINENO: portable drive not connected - aborting\n\n" >&2
    exit 192
fi

# Cleanup
printf "`$DATE` Files backed up successfully\n-------------------------------------------------\n"
exit 0   # all is well