template for my tar backup script

backup.sh

#!/bin/bash 
############################
#
# Backup Script
#
############################

# Source
source_files="/dir"

# Destination
dest="/dir"

# Archive details
day=$(date +%A)
hostname=$(hostname -s)
archive_file="$hostname-$day.tgz"

# Print info
echo "Backing up $source_files to $dest"
date
echo

# Backup 
tar czf $dest/$archive_file $source_files

# End
echo
echo "Done"
date

# Long listing of files in $dest to check file sizes.
ls -lh $dest