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Linux

Automating the Login Script

Post date: April 17, 2005, 10:04 Category: Miscellaneous Views: 3209 Comments
Tutorial quote: In a perfect world, you could spend a few weeks creating a system and the result would be a system that never required manual maintenance or modifications. Whether this ideal will ever be achieved is debatable, but it definitely won't happen in the near future. In the meantime, we still have to do things manually, even if only once in a while. When I must do things manually, I'm not usually happy about it. In fact, it usually means that there has been an emergency, so other people aren't happy about it either. In times like this, it is nice to have a consistent and efficient user interface on every machine. The information and examples presented in this article assume that you are using the bash shell. However, you can modify all of the scripts so that they work in other shells. In some cases, they might even work unmodified (like in the standard Bourne Shell [sh]). Other shells will also work, but they might have different methods for changing the prompt and creating command aliases. The principles in this article should be relatively easy to adapt to the shell of your choice.
Linux

HOWTO build a LiveCD from scratch

Post date: January 1, 2006, 02:01 Category: Miscellaneous Views: 3719 Comments
Tutorial quote: This mini-HowTo will show you how to create your own LiveCD.
Unix+clones

Learn REXX fast

Post date: September 1, 2005, 01:09 Category: Programming Views: 4076 Comments
Tutorial quote: If you’ve programmed under IBM operating systems, you’ve undoubtedly heard of Rexx. Rexx is the scripting and command language IBM bundles with all its mainframe, mid-range, and lower-end operating systems. What you might not be aware of is that Rexx also runs on almost every other operating system in the known universe. You can download Rexx free for all versions of Windows®, Linux, UNIX®, BSD, Mac OS, and DOS, and many other systems. It even runs on the three major operating systems for handheld devices: Windows CE, Palm OS, and Symbian/EPOC32.

What this means is, if you learn Rexx, you’ll know a scripting language that runs everywhere from mainframes to handhelds—and everything in between. Rexx is a general-purpose language that's powerful enough for mainframes yet flexible enough for other platforms. Best of all, Rexx is easy to learn.
Debian

Intrusion Detection For PHP Applications With PHPIDS

Post date: June 24, 2008, 14:06 Category: Security Views: 5469 Comments
Tutorial quote: This tutorial explains how to set up PHPIDS on a web server with Apache2 and PHP5. PHPIDS (PHP-Intrusion Detection System) is a simple to use, well structured, fast and state-of-the-art security layer for your PHP based web application. The IDS neither strips, sanitizes nor filters any malicious input, it simply recognizes when an attacker tries to break your site and reacts in exactly the way you want it to. Based on a set of approved and heavily tested filter rules any attack is given a numerical impact rating which makes it easy to decide what kind of action should follow the hacking attempt. This could range from simple logging to sending out an emergency mail to the development team, displaying a warning message for the attacker or even ending the users session.
Unix+clones

Python Programming for Beginners

Post date: September 19, 2006, 09:09 Category: Programming Views: 45837 Comments
Tutorial quote: Despite what assembly code and C coders might tell us, high-level languages do have their place in every programmer's toolbox, and some of them are much more than a computer-science curiosity. Out of the many high-level languages we can choose from today, Python seems to be the most interesting for those who want to learn something new and do real work at the same time. Its no-nonsense implementation of object-oriented programming and its clean and easy-to-understand syntax make it a language that is fun to learn and use, which is not something we can say about most other languages.

In this tutorial, you will learn how to write applications that use command-line options, read and write to pipes, access environment variables, handle interrupts, read from and write to files, create temporary files and write to system logs. In other words, you will find recipes for writing real applications instead of the old boring Hello, World! stuff.
Gentoo

VHCS2 on Gentoo HowTo

Post date: April 20, 2005, 13:04 Category: Installing Views: 4904 Comments
Tutorial quote: Want to build web hosting service on top of Gentoo? Well now you can with VHCS2 (Virtual Hosting Control System).
FreeBSD

Building a FreeBSD Build System

Post date: April 15, 2006, 00:04 Category: System Views: 4394 Comments
Tutorial quote: When you finish this article, you will have an unbeatable update system. Even mergemaster will work faster. You will have an update system in which a machine update/upgrade will take less than 10 minutes.
Fedora+Core

Building a Linux cluster on a budget

Post date: November 18, 2005, 19:11 Category: Network Views: 4743 Comments
Tutorial quote: So you need a lot of computing power but don't want to spend tens of thousands of dollars on a commercial cluster? Or maybe you just have a lot of machines sitting idle that you would like to put to good use? You can build a powerful and scalable Linux cluster using only free software and off-the-shelf components. Here's how.
FreeBSD

Using Software RAID-1 with FreeBSD

Post date: November 29, 2005, 03:11 Category: System Views: 4497 Comments
Tutorial quote: Have you ever needed a software RAID solution for a low-end server install? Perhaps you've wanted your workstation to take advantage of the redundancy provided by a disk mirror without investing in a hardware RAID controller. Has a prior painful configuration experience turned you off software RAID altogether on Unix systems?


Since 5.3-Release, FreeBSD comes with gmirror(8), which allows you to easily configure a software RAID 1 solution. While tutorials on gmirror exist, I found them to require either manual calculations of partition sizes with bsdlabel or the use of a fix-it floppy on an existing system.

It made more sense to me to configure RAID during the install of the operating system. I also wanted a procedure that was easy to follow and didn't introduce human error in the form of a math miscalculation. After cobbling together the available documentation and experimenting my way through various configurations, I came across a procedure that has worked well for me on several different systems. I also received valuable feedback from Pawel Jakub Dawidek, the author of gmirror, who gave some insight into some of the not yet documented features of gmirror.
Linux

How-to build a LINUX router, firewall, gateway

Post date: June 13, 2010, 09:06 Category: Network Views: 5368 Comments
Tutorial quote: This tutorial shows how you can use a linux box as a bridge, router, firewall and gateway.
Web-based applications and online marketing solutions - LumoLink