Installing PowerDNS with MySql backend
The PowerDNS Nameserver is a modern, advanced and high performance authoritative-only nameserver. It is written from scratch and conforms to all relevant DNS standards documents. Furthermore, PowerDNS interfaces with almost any database.
This tutorial has been tested and is working on Debian etch and lenny
1. Install the PowerDNS server and MySql backend using apt
apt-get install pdns-server pdns-backend-mysql
Monitoring Varnish with Munin
Varnish is a great reverse proxy and very useful for load balancing. Here you can find a tutorial on installing Varnish: Installing and configuring Varnish HTTP accelerator.
Munin is a network/system monitoring application that presents output in graphs through a web interface. If you haven't installed it already, use this tutorial: Monitoring multiple servers with Munin.
Assuming you have both varnish and munin installed, here's a tutorial on installing a plugin for munin to monitor Varnish.
1. Install git-core to receive the plugin from github
apt-get install git-core
Scan your server for rootkits with rkhunter
rkhunter (Rootkit Hunter) is a tool that scans for rootkits, backdoors and possible local exploits. It does this by comparing SHA-1 hashes of important files with known good ones in online database, searching for default directories (of rootkits), wrong permissions, hidden files, suspicious strings in kernel modules, and special tests for Linux and FreeBSD.
1. Install rkhunter
apt-get install rkhunter
Installing and using the IPMI tool
The Intelligent Platform Management Interface (IPMI) is a standardized computer system interface used by system administrators to manage a computer system and monitor its operation.
The development of this interface specification was led by Intel Corporation and is supported by more than two hundred computer systems vendors including Dell, Hewlett-Packard, Intel, and NEC Corporation.
1. Install the ipmitool which is used to send commands and receive information from the management interface.
apt-get install ipmitool
How to install LAMP (Apache, PHP and MySql in Linux)

Here's a basic guide on how to get Apache2, PHP5 and MySql working on most Debian based distros in a few easy steps.
1. Install Apache2 and PHP5 (as an Apache module)
apt-get install apache2 php5 libapache2-mod-php5 php5-mysql
Installing Zend Optimizer
The Zend Optimizer enables you to run Zend Guard encoded files.
1. Download a copy of Zend Optimizer / Guard from the location below and put it into /tmp
http://www.zend.com/en/products/guard/downloads
Installing ionCube
ionCube protects software written using the PHP programming language from being viewed, changed, and run on unlicensed computers.
1. Download ionCube loaders
wget http://downloads.ioncube.com/loader_downloads/ioncube_loaders_lin_x86.tar.gz
