#!/bin/sh
MYSQLDUMP="/usr/bin/mysqldump"

cd /tmp
rm -rf web_backup
mkdir web_backup
cd web_backup
$MYSQLDUMP dumpz > dumpz.org.sql
... many lines like above ...
cp -r /etc/nginx .
cp -r /etc/apache2 .
cp -r /web/pybb.org .
tar zcf web_backup.tgz *