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In this article I will explain how to make your Linux box secure by taking  basic security measures.

We would like to present an interview with foxbat, the head admin of the Free Internet Chess Server. (REJECTED article.)

Falcon's Eye is a 3D graphical front end for NetHack, the oldest computer role-playing game still played and developed.

Samba is a suite of Unix applications that speak the SMB (Server Message Block) protocol. Windows uses SMB to perform client-server networking.

A long awaited and the only book that gathers information gems about this technology.

This article shows how to acquire sound data from internet streams and to process this sound data and to convert it to ogg vorbis encoded format.

Art of Unix Programming second article, Complexity

This is the second part in the series about the microcontroller based powersupply.

A review of the book "The Linux Enterprise Cluster" from No press.

How to get a USB mouse to work without the need to restart X-server process.

Here is one toolchain for old revues paper scanerization to htmlization.

A very small an really powerful DC power supply for your hobby lab. It has lots of features which you normally find only in very expensive power supplies. This one is however cheap, small and easy to build.

How to work around a bug in acroread version 7

How to quickly stop your linux computer from beeping.

This article presents the snavigator, a powerful code analysis, cross-referencing and re-engineering tool.

Two really cool firefox extensions.

In this article we use lcdproc to connect a LCD display and 2 buttons to a linux pc; simple and easy to build for everybody.

This article shows how easy it is to extract biological information from DNA, RNA and proteine sequences Databases using small perl scripts.

Good looking alternatives to the Windows key.

GNU Bayonne is a scalable telephony application server.

One of the most important things to keep in mind while optimizing an +application is: optimize the code where it counts.

This article explains how to clone partitions with dump and +restore.

This article is written for people who have a lot of text +editing/authoring to do and are primarily interested in getting the text edited +fast, reliable with a plesant looking printout.

The iptables/netfilter framework gives us the possibility to add features. To do so, we write kernel modules that registers against this framework.

Making an I2C compatible, digital thermometer with the Atmel Atmega8 microcontroller. The hardware part.

Generating PDF from HTML files.

How to install a gpg plugin and check a mail signature within Sylpheed-Claws with some bash pipes commands.

A Knoppix based Live CD that provides a Linux Cluster ready for MPI and other Parallel Computing in less than 15 minutes!

LinuxFocus tip number 1 for January 2005

In this article, the author talks about driver installation and usage of some common Wireless LAN adapters and related issues such as authentication based on 802.1x methods.

Checkinstall is a utility to automatically build RPM packages from tar.gz source pages. This makes it possible to do a "clean" installation and de-installation of almost any source code tar.gz package.

gEDA (gnu Electronic Design Automation) is a set of programs to design electronic circuits.

SPF stands for Sender Policy Framework an antiforgery standard to prevent the forging of e-mail addresses.

Making Hibernate (suspend-to-disk) work on a IBM Thinkpad T20 with no windows installed.

Microcontrollers are the universal hardware components of the future. Learn how to program it under Linux in C.

Free Pascal is on the rise with a combination of text mode programming and OOP as powerful as RAD Delphi.

This article reviews different possibilities to build platform independent graphical user interfaces.

This article shows how useful Linux-based software in science is.

In this article we present the network traffic analyzer "darkstat". We cover installation, start and usage of this program.

Creating a simple animation is fun and easy, for children and adults alike.

Creating panoramic views using Hugin, Enblend and The Gimp.

This article explains the concept of mount points but I hope the article has also some information which is interesting to readers who are not new to linux.

User Mode Linux, UML in short, is one of the many interesting features in the 2.6.x Kernel. This is an interview with Jeff Dike, the creator of UML.

A real-life case of data loss with a happy end, thanks to reiserfsck. Three cheers for journaling file systems and their tools.

This article gives a basic introduction to the "Very Secure FTP Daemon". I am beginning with a general description of FTP and vsftpd. After that we will have a look at the installation, configuration and start options of the vsftp daemon.

In the second part of "Temperature Monitoring With Linux" we see how to store the data in mysql and represent it graphically.

Everybody claims that it is easy to find and fix bugs in programs written under Linux. Unfortunately it is very hard to find documents explaining how to do that.

Dia a gnome based diagram editor.

In an ANSI compatible terminal (like xterm, rxvt, konsole ...) text may be shown in colors. This article explains how to do that.

Gentoo Linux is a source package based Linux system. It is very different from the established commercial Linux distributions.

There are a whole lot of HOWTOs out there which tell you what to do if you have a serious problem with your Linux installation. But there is no one there who told you what you should do before disaster strikes you! This article gives some suggestions as to what you can do even without a full tape backup.

Run Time Access is a library that lets you view the data structures in your program as tables in a PosgreSQL database or as files in a virtual file system (similar to /proc).

In this article we model a clock with Blender.

Backup is one of the hardest and most neglected parts of system administration. This article presents a very easy solution based on rsync.

S/390 is a robust hardware platform from IBM for large enterprices. Linux runs on it.

Gambas is one of the currently available graphical Basic programming environments for Linux.

In the windows world incoming mails are received via POP3 or IMAP and outgoing mails are sent directly via SMTP. This split setup can cause all kind of headaches especially if you are using different ISPs all the time.

MySQLTcl is a Tcl library to do SQL queries.

In these article series, we will learn how to write graphical user interfaces (GUIs) using GTK.

Tuxpaint is a paint program (not only) for children and it is really great and fun!

Most statistics packages seem to be overwhelming in their scope, forcing the user on a very steep learning path, most of them are also very expensive. There is however a refreshing alternative: SalStat.

This is a presentation of the different Reverse Polish Notation calculators available for the Linux desktop.

This article shows you how to "debug" you programs at the system call level.

storeBackup is a very versatile backup tool.

Software to develop electronic circuits? Yes, it's available for Linux too. This article will show you what you need.

This is a review of notebooks from linuxcertified.com.

The proc filesystem is a virtual filesystem which provides a lot of information about hardware and kernel internal data structures.

In this article we model a treasure chest with Blender.

Finally your finished you long awaited program and you want to distribute it. For others to use the program you need documentation. It's time to write a man-page.

This a review of a new book from Eric S. Raymond.

This article explains the various brush types that Gimp has and shows how to create own brushes.

This article shows how you can monitor temperature with a very simple and inexpensive circuit.

This is the last article in the series on concurrent programming.

This article describes how to use your linux box as an ISDN fax machine.

In this third part of our series about Blender we set our train in a kid's room and model some more toys.

In this article you learn how to use the C-API that comes with MySQL.

My Mom belongs to a generation which grew up without computers. She uses now Linux on the desktop and loves it.

In this second article in our series about modeling with Blender we create a little toy train.

How to fetch e-mail with a dial-on-demand router from www.fli4l.de.

CVW (Collaborative Virtual Workspaces) is one of the finest open source tools available for the development of virtual education.

In this article we give you some basic ideas how to improve on your digital photos with The Gimp.

Some background information about a new virtual learing project at the Universidad Santiago de Cali.

In this article we present methods to detect an intrusion and explain possibilities to respond to such and attack.

In this article we describe how to build an autonomous robot with a microcontroller that will always try to walk to the brightest spot.

This is a very short review of some of the smaller but very useful tools from GNUstep.

This article describes a 1bit logic analyser which samples data and sends it to a Linux PC via the rs232 port.

The word-processor Textmaker is now also available for Linux. Let's see how good it really is.

This is a review of the book Mastering Red Hat Linux 9. by Jang, Michael, Sybex.

This is the second part in the GTK series. This time we will discuss boxes and tables.

Blender is an open source 3D graphics program. In this first article in a series about Blender we look at the very basics and build a stage with sphere and cube in it.

SDL is the simple direct media layer often used to implement fast and portable graphics.

How to setup a basic firewall.

How to install Ximian Evolution under Mandrake 9.x.

The concept of Workspace Manager appeared with NeXT at the end of the 80's. It was a complete new way of using a system GUI. GWorkspace is the GNUstep free implementation of this revolution.

This article will not only present typical IDS architectures but also typical attacks against Intrusion Detection Systems are discussed and analysed.

It's one thing to formulate a great idea for a Website that's informative, entertaining, and commercially viable. It's quite another turning a passion into a robust e-commerce Website.

This is the first article in a series on programming of graphical user interfaces with GTK.

This series of articles has the purpose of introducing the reader to the concept of multitasking and to its implementation in the Linux operating system.

This is an instruction how to make your own bootable mini CD.

Everything about sound. The physics, wave forms, the human ear.... What is digital sound...?

This article is an in depth description of SSH.

Beginning PHP4 Databases is a book from Wrox press.

This article presents the different types of external attacks that a cracker can use.

This article describes an inexpensive solution to messure air pressure with a Linux PC.

This article shows how to set up JDBC access for PostgreSQL on redhat 8.0 and how to create a SSL tunnel using Sun's Java Secured Socket Extensions, to enable secured access to a remote postgres database.

This article explains how to modify the LCD display presented in May2002 to work with the USB interface. The design is based on a chip from www.ftdichip.com.

The continues the series on Concurrent programming. Read also the articles from the previous 2 issues.

HTML::TagReader is a light weight Perl module to process an HTML file Tag by Tag.

The article presents techniques and the tools for Debian GNU/Linux to detect and track people wo broke into your computer network.

This article introduces a QT application to study the development of the world population.

This aricle takes a look at the species "BSD UNIX".

The Basic programming language is old and "basic" but still used. Although Linux has much more powerful scripting languages than Basic, it also offers a number of Basic interpreters.

If you have large number of Linux/Unix system to administer, then you'll certainly need some scripts to help you automate some of the work. This article focuses on ssh and the utilities that come with it.

Spam E-mail is growing at an alarming rate and it is a major problem for almost everybody. In this article we will explain what to do against this plague.

This is the second article in the series on concurrent programming.

In this article we build a very robust Microcontroller regulated power supply for your "lab" at home.

2002-09-03 2002-09-28 In this article we dissect the huge lizard - in particular we investigate the browser part. It's actually a review of Mozilla 1.1 with two add-ons: 'Mouse Gestures' and 'RadialContext'.

This article presents the different operations a cracker can do after having succeeded in entering a machine. We will also discuss what an administrator can do to detect that the machine has been jeopardized.

Writing a device driver is a challenging and an adventurous job. Once the device is registered in the driver's init_module routine, the resources for the device should be allocated. One of the main resources for the device is I/O port. For dynamically linked drivers, the developer should be careful to allocate unused range of port addresses for their device.

RAD stands for Rapid Application Development.

This series of articles is especially written for newbie programmers using Gnome and GNU/Linux.

Xdialog and dialog are two classic utilities to enhance your shell scripts with a graphical user interface.

In this article you will learn how to write an interactive graphics program in Fortran.

LAMP stands for Linux Apache MySQL PHP.

This series of articles has the purpose of introducing the reader to the concept of multitasking and to its implementation in the Linux operating system.

This article describes how to design a frequency counter with the AT90S4433 Microcontroller and Linux.

Viruses, Worms and Trojan Horses could also be a threat to Linux.

BibTex is a system which enables you to insert references from a (file) database into Tex documents. In this article I will show you how you can use a BibTex like reference system with DocBook

This article is trying to teach you how HD44780 compatible LCD-displays work at the bits and bytes level.

This article explains how to get Midi to work with Alsa. If you are really serious about sound and Linux then your need Alsa.

This article is an overview over another free Unix system: FreeBSD.

Jazz is a midi sequencer with many interesting features for editing and composing your own music!

This is a simple circuit to connect to the serial line of your server.

Security in computers networks is probably one of the biggest technological challenges of the 21st century. This article provides a general overview over the most important aspects.

How I setup Mozilla for Real Player, Acrobat, Flash, and a generic plug-in Plugger.

Setting up Efax to send and receive faxes on RedHat 7.2.

Beginning Databases with MySQL is a new book from Wrox-press.

2002-05-24 2002-06-16 2002-06-21 2002-06-23 2002-06-23 2002-06-23 2002-06-25 2002-06-25 Many people are scared when they hear "recompile the kernel". This article shows how you do it and how easy it is.

Connect your digital video camera via firewire to Linux and start cutting.

This article describes the use of Kate and its XML plugin as a tool for editing DocBook XML documents.

In this article we use an Atmel Microcontroller to build a LCD panel for our server.

This is a short description on how to setup the usb drivers for the Minolta Dimage 5/7 cameras under Linux.

GNUMail.app is a NeXT Mail.app clone running under GNUstep and MacOS X.

This article explains what XML is and why it is useful.

This article expains what cryptography is and how it works.

This article introduces 2 programs for Linux to explore the universe.

KDE released their latest code as version 3 recently. This article will give you an idea what it would be like to try it for yourself.

This article is focused on a Linux system with SAMBA with the purpose to run some services, typically provided by Windows operating systems.

This is a guide on how to configure Samba.

GCC is a good compiler but the man-page is long and complex. This article shows how to use the compiler under normal circumstances -- and it is very easy to use.

The Internet Operating System from Rebol is a very light weight "group ware" application.

The article explains how to build and install a development environment for the AVR 8-bit Risc Microcontroller series from Atmel.

Qmail is a mail transport agent (the program that sends the mails through the network).

Ncurses is a library that provides window functionallity to text-based terminals.

A proxy server can help to speed up an internet connection.

Barrel Patrol 3D is a cute little 3d game, based on Ripoff, a classical arcade game from the early 80's.

This article shows how you can create nice logos and images from Dingbat fonts with just a few clicks.

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QCAD is a simple 2D CAD system. With QCAD you can easily construct and modify technical drawings.

The Linux X Window System (X11) is much more than just an Windows System.

This article is written for beginners in the area of Gnome and GNU/Linux. The author presents an educational tool to write Gnome GUIs using Python.

Chrooted system services improve security by limiting damage that someone who broke into the system can do.

This article demonstrates how easy it is to access a mysql database from perl.

This article explains several ways to burn CDs under Linux.

English/November2001/index.shtml

This article shows how to use even more fonts and patterns with The Gimp.

Mask layers in Gimp are a really universal tool for all kind of tricks.

NIS is a very valuable service for larger networks and simplifies the administration.

There are very little cases where cgi scripts are exploited but nevertheless a poorly designed cgi program can be a security problem.

Nessus is one of the best security scanners available today.

This article will show you how you can configure your reports from Lire.

This article presents a management interface for the MOSIX-Cluster technology (www.mosix.org).

This is a miniature mouse that makes your notebook perform like a desktop.

Explore the land of the penguin with tux as a guide on your side.

The ATEN UC-232A is a RS232 serial line to USB adapter.

English/September2001/index.shtml

English/September2001/article139.meta.shtml XMRM (Multi Resolution Morphing for X) is a morphing program that allows one to create an mpeg video based on the the transformation from one image into another one.

This article focuses on problems related to multitasking and exclusive access of resources.

This article describes a XML based database system.

This article describes a new log file analyzer by LogReport.org: Lire.

Portsentry is a Intrusion Detection System for monitoring TCP/UDP ports.

UUCP is an old protocol but it is very good to handle E-mail over dialup connections.

The shell has its own quite powerful programming language. This article explains how to write shell programs also known as shell scripts.

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English/July2001/article148.shtml English/July2001/article148.meta.shtml This is the first article in a series about NIS, formerly known as Sun Yellow Pages.

English/July2001/article162.meta.shtml This article describes the client side setup for NIS.

This is an introduction to the security scanner nmap.

This fourth article deals with format strings, a type of security holes we've been hearing much about lately.

Review of the new improved version of one of the lightest browsers around.

Professional Perl Programming is a book from Peter Wainwright et al. Published by Wrox press.

This is a step-by-step instruction for compiling a customized Kernel.

This is an introduction to a new Ramdisk alternative in the 2.4 Kernel.

ImageMagick has some interesting functions that you do not find in any other graphics software.

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English/November1998/article71.shtml English/November1998/article71.meta.shtml 3 lbs, 31,000 feet and 3 glasses of wine at 397.31 bogomips : Linux and the Sony Vaio 505gx. Another review of a Linux system running on a latop.

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