What is Apache / HTTPD ?
Apache is a freely available Web server that is distributed under an open source license. It is the most widely-installed Web server.

What is PHP ?
PHP is a scripting language originally designed for producing dynamic web pages. It has evolved to include a command line interface capability and can be used in standalone graphical applications.

What is MySQL ?

What is Postfix, Postfixadmin, Cyrus-SASL, Courier Authlib, Courier-Imap, Squirellmail ?

Postfix is a free open source mail transfer agent (MTA), a computer program for the routing and delivery of email. It is intended as a fast, easy-to-administer, and secure alternative to the widely-used Sendmail MTA.

Postfix Admin is a web based interface to configure and manage a Postfix based email server for many users.

What is Smokeping?

SmokePing does not stand alone. It relies on various other tools and services being present. Apart from a Unix OS and a working Perl installation you need the following things. The list contains the names of the tools together with the version of the tool which I am using, and a link for downloading the tool.

Preparing anything to install Smokeping

Download Smokeping : http://oss.oetiker.ch/smokeping/pub/smokeping-2.4.2.tar.gz