shell script to backup a directory

directory_backup_script.sh

#!/bin/bash

# This file must be put in the same directory of TargetDir
# Because using relative path to avoid tar warning:
# tar: Removing leading `/' from member names

TargetDir="html"

DestDir="/var/www/backup/dir"

NOW="$(date +"%Y-%m-%d")"

tar -czf "$DestDir/html.$NOW.tar.gz" "$TargetDir"