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Debian Rolling your own Debian packages (part 1)
Post date: January 21, 2006, 01:01 Category: Software Views: 33
Tutorial quote: This two-part article explains how to make a Debian package of simple piece of software, presumably something you have written yourself. Although building a new package is more complex than rebuilding one or having one generated, the idea is that it is actually surprisingly simple to create basic Debian packages. In fact, if you can make software install into a temporary installation tree, you're already 90% done! This text provides a quick alternative to the more comprehensive Debian New Maintainers' Guide. Only knowledge of Makefiles and the basic Debian package tools is assumed.

The first part of this article will continue with some preliminary information about Debian packages. In the second part we walk through a concrete packaging example.
Linux How to set up a mail server on a GNU / Linux system
Post date: February 7, 2006, 02:02 Category: Network Views: 52
Tutorial quote: Easy to follow howto on setting up a mail server with unlimited users and domains, with IMAP/Pop access, anti-spam, anti-virus, secure authentication, encrypted traffic, web mail interface and more.

Based on an Ubuntu distribution platform, but instructions are distro generic.
Debian Speedup DNS requests with a local cache
Post date: April 26, 2006, 05:04 Category: Network Views: 12
Tutorial quote: One common server bottleneck is DNS lookups. Many common server tasks such as from looking up hostnames to write Apache logfiles and processing incoming mail require the use of DNS queries. If you're running a high-traffic system it might be useful to cache previous lookups.
Debian Automated distributed backups for laptops
Post date: February 14, 2006, 16:02 Category: Network Views: 42
Tutorial quote: This document will describe the setup I made for automating the backup tasks for all laptops here in the house. My servers use the same backup server and infrastructure, but right now they don't have the checks and scripts because they are online 24/7 and my backup server is triggering the backup process. This is however not true at all for the laptops.

Laptops can be at different places, powered down, suspended, put to sleep etc. So I needed a different approach for them.
Unix+clones How to Set Up a Jabber Server
Post date: April 12, 2005, 12:04 Category: Software Views: 37
Tutorial quote: Unless you have been living under a rock for the past few years, you must have heard about instant messaging and how it has changed the world of communications over the Internet. According to http://www.webopedia.com, Instant Messaging (IM) is a service that alerts users when their friends or colleagues are on line and allows them to communicate in real time through private online chat areas. Two of the most popular IM services are AOL Instant Messenger (AIM) and MSN Messenger. Unfortunately, most of the publicly available servers use proprietary protocols that only allow you to communicate with users on the same system. These systems are not compatible with each other and can't be accessed from other clients.

Jabber is an open source implementation of the IM server that aims to change this. It uses streaming XML protocols that are free, open, and public. These protocols have been formalized by the Internet Engineering Task Force (IETF) as the approved instant messaging and presence technology under the name of XMPP. The first Jabber technologies were developed in 1998 by Jeremie Miller and is now used on thousands of servers world-wide to enable millions of users to communicate with each other.

The biggest advantage of the Jabber server when compared with commercial IM servers is that, since it is open source, anyone can run a Jabber server and it can be restricted to a specific community like a company work force or a group of friends. In this article, I will document the steps I took to set up a Jabber server and how I managed to overcome the difficulties I faced. Hopefully this will make it easier for you to set up your own Jabber server.
Unix+clones SpamAssassin, ClamAV and Procmail Howto
Post date: April 15, 2005, 20:04 Category: Network Views: 44
Tutorial quote: This document describes how to install SpamAssassin (for filtering SPAM) and ClamAV (for filtering viruses, trojans, worms, etc.) and how to invoke them by using procmail recipes. It is suitable for scenarios where Sendmail or Postfix deliver emails to local users. It should work (maybe with slight changes concerning paths etc.) on all *nix operating systems. I tested it on Debian Woody so far.

In the end you will have a system where Sendmail or Postfix deliver emails to a local user; the emails are passed to procmail which invokes SpamAssassin and ClamAV in order to filter the emails before they arrive in the user's inbox. However, the installation of Sendmail and Postfix are not covered in this document.

This howto is meant as a practical guide.
Linux Configuring Apache for Maximum Performance
Post date: March 31, 2006, 22:03 Category: Optimizing Views: 14
Tutorial quote: Apache server performance can be improved by adding additional hardware resources such as RAM, faster CPU etc. But, most of the time, the same result can be achieved by custom configuration of the server. This article looks into getting maximum performance out of Apache with the existing hardware resources, specifically on the Linux systems.
Unix+clones Two-in-one DNS server with BIND9
Post date: April 1, 2006, 00:04 Category: Software Views: 15
Tutorial quote: This tutorial shows you how to configure BIND9 DNS server to serve an internal network and an external network at the same time with different set of information. To accomplish that goal, a new feature of BIND9 called view is used. As a tutorial it'll walk you through the whole set up, but initial knowledge of BIND and DNS is required, there are plenty of documents that cover that information on the Internet.
Debian The Perfect Xen 3.0 Setup For Debian
Post date: April 1, 2006, 00:04 Category: System Views: 12
Tutorial quote: This tutorial provides step-by-step instructions on how to install Xen (version 3.0.1) on a Debian Sarge (3.1) system.

Xen lets you create guest operating systems (*nix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host operating system (dom0). Using Xen you can separate your applications into different virtual machines that are totally independent from each other (e.g. a virtual machine for a mail server, a virtual machine for a high-traffic web site, another virtual machine that serves your customers' web sites, a virtual machine for DNS, etc.), but still use the same hardware. This saves money, and what is even more important, it's more secure. If the virtual machine of your DNS server gets hacked, it has no effect on your other virtual machines. Plus, you can move virtual machines from one Xen server to the next one.
Unix+clones Configuring Apache - Don't Succumb To The "Slashdot Effect"
Post date: January 30, 2006, 22:01 Category: Optimizing Views: 28
Tutorial quote: Like many techno-geeks I host my LAMP website on a cheap ($150) computer and my broadband connection. I have also wondered what would happen if my site was linked on Slashdot or Digg. Specifically, would my setup be able to survive the "Slashdot Effect?" A Pentium 100mhz can easily saturate a T1's worth of bandwidth and my upload speed is capped (supposedly) at 384kbps, so the server should easily be able to handle that. My bandwidth will be saturated before the server is incapacitated, at least that's the idea.