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This is an index of all LinuxFocus articles sorted by issue.
A digital DC power supply -- part 3: command control from the PC
A very small an really powerful DC power supply for your hobby lab. In this third part. We make it possible to remotly control the DC power supply via a command line interface.
LF Tip: #defines for writing portable C-code
How to get a list of available defines.
Automate the creation of graphs with Graphviz
Graphviz is a command-line open source graph visualization software.
Computer Assisted Simulation of DNA using Linux and Perl
In this article we discuss a way to generate n-DNA sequences with s-nucleotids using Perl programmes.
LF Tip: USB mice and laptops
How to get a USB mouse to work without restarting the X-server process.
A digital DC power supply -- part 2: the software
very small an really powerful DC power supply for your hobby lab. In this second part I explain how the software works and one more feature is added.
Book review: The Linux Enterprise Cluster
A review of the book "The Linux Enterprise Cluster" from No Starch press.
LF Tip: Don't beep at me
How to quickly stop your linux computer from beeping.
A digital DC power supply
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.
LF tip: Using Acrobat 7 with kde and kprinter
How to work around a bug in acroread version 7
Faulty Software
Controversial discussions have started around estimates about the number of faults which a given software has. Often the fault-density is used as a measure for the quality of software. Is that correct?
A toolchain for transformation from paper to HTML
Here is one toolchain to convert and old paper magazine into html document.
LF Tip: essential firefox extensions
Two really cool firefox extensions.
Cruising with the snavigator
This article presents the snavigator, a powerful code analysis, cross-referencing and re-engineering tool.
Bayonne: the opensource project for phone and IVR services
GNU Bayonne is a scalable telephony application server.
LF Tip: solving the ugly key problem
Good looking alternatives to the Windows key.
LINUX & PERL, computer tools for study and analysis of biological information
This article shows how easy it is to extract biological information from DNA, RNA and proteine sequences Databases using small perl scripts.
lcdproc -- LCD displays easy to use and easy to build
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.
Part 2 -- A digital thermometer or talk I2C to your atmel microcontroller
In this second part of the article we will connect a LCD display and I will explain how the software works.
LF Tip:Cloning entire PCs over the network
This article explains how to clone partitions with dump and restore.
Optimizing C/C++ programs using the GProf profiler
One of the most important things to keep in mind while optimizing an application is: optimize the code where it counts.
A digital thermometer or talk I2C to your atmel microcontroller
In this article we see how to interconnect the microcontroller to a linux PC over a physical RS232 interface without the extra MAX232 chip.
LF Tip: generating PDF from html documents
Generating PDF files from html documents with all the pictures included is not easy. Here are a few tips how to do it.
Writing your own netfilter match
The iptables/netfilter framework gives us the possibility to add features. To do so, we write kernel modules that registers against this framework.
Professional Tex(t)Authoring with LyX
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.
LF Tip: LinuxFocus Live Bookmarks
LinuxFocus tip January 2005
ParallelKnoppix
A Knoppix based Live CD that provides a Linux Cluster ready for MPI and other Parallel Computing in less than 15 minutes!
Checking gpg mail signatures with Sylpheed-Claws
How to install a gpg plugin and check a mail signature within Sylpheed-Claws using some bash pipes commands.
An introduction to SPF
SPF stands for Sender Policy Framework an antiforgery standard to prevent the forging of e-mail addresses.
Using gEDA
gEDA is a tool-chain for electronic circuit design.
LF Tip: emacs keybindings to edit the url in firefox
LinuxFocus tip December 2004
Fn-F12: Hibernate a IBM Thinkpad T20 laptop
How to get hibernate (suspend-to-disk) to work on an IBM Thinkpad T20 with no windows installed
Checkinstall
Checkinstall is utility to automatically build RPM/Debian/Slackware 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.
Wireless LAN under Linux
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.
Programming the AVR Microcontroller with GCC, libc 1.0.4
How to program the Atmel AVR Microcontroller with GCC. An update of the March 2002 article for libc 1.0.4
LF Tip: switching off font anti-aliasing
Linuxfocus tip for November 2004
Get To know a free pascal compiler: Free Pascal
Free Pascal is on the rise with a combination of text mode programming and OOP as powerful as RAD Delphi.
LF tip: Customize motd & isse
LinuxFocus tip number 2 for November 2004
Platform independent software development
This article reviews different possibilities to build platform independent graphical user interfaces.
LF Tip: Changing the keyboard layout on the fly
Linuxfocus tip for October 2004
Linux in science -- or how a useful neural network utility was developed
This article shows how useful Linux-based software in science is.
darkstat - a network traffic analyser
In this article we present the network traffic analyzer "darkstat". We cover installation, start and usage of this program.
Simple Animation
Creating a simple animation is fun and easy, for children and adults alike.
Creating panoramic views using Hugin, Enblend and The Gimp
In this article we show you how to create a panoramic picture using Hugin, Enblend and The Gimp.
The mystery of mount points
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.
Interview with Jeff Dike
Jeff Dike is the creator and maintainer of User Mode Linux, a very interesting new feature of the 2.6 Linux kernel. This article will give some insight into UML and the people behind it.
Data loss, worst case
A real-life case of data loss with a happy end, thanks to reiserfsck. Three cheers for journaling file systems and their tools.
vsftpd - an introduction to the Very Secure FTP Daemon
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.
Temperature monitoring with Linux (part 2)
In the second part of "Temperature Monitoring With Linux" we see how to store the data in mysql and represent it graphically.
Why does this not work!? How to find and fix faults in Linux applications.
Everybody claims that it is easy to find and fix faults in programs written under Linux. Unfortunately it is very hard to find documents explaining how to do that.
Dia, a diagram creation program
In this article we take a look at dia, a gnome based diagram creation program.
Colorful shells -- Using ANSI color codes
This article explains how to use colors or bold text in a Terminal.
Gentoo linux
Gentoo Linux is a source package based Linux system. It is very different from the established commercial Linux distributions.
shivalik -- simple configuration backup (defying Murphy's laws)
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. Good for us. But there is no one there who told you what you should do before disaster strikes you!
Talking to a Running Process
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 virtural file system (similar to /proc).
Going 3D with Blender: Modeling a clock
In this article we model a clock with Blender.
Rsync: The Best Backup System Ever
Backup is one of the hardest and most neglected parts of system administration. This article presents a very easy solution based on rsync.
Linux for S/390 (IBM z-Series)
S/390 is a robust hardware platform from IBM for large enterprices. Linux runs on it.
Gambas: Basic for Linux
Gambas is a Basic interpreter for Linux with GUI support.
uucpssh.org: UUCP e-mail for Linux fans
In the windows world incomming 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.
Introduction to the TclMySQL library
MySQLTcl is a Tcl library to do SQL queries.
GUI Programming with GTK - 3
In these article series, we will learn how to write graphical user interfaces (GUIs) using GTK.
Tuxpaint: A paint program for kids
Tuxpaint is a paint program (not only) for children and it is great fun!
Statistics Anyone?
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
RPN calculators for Linux
Reverse Polish Notation is the most advanced entry method for calculators. This article will review some of the available RPN desktop calculators for Linux.
Tracking Linux Internals with Syscalltracker
Syscalltracker offers a mechanism to watch Linux at kernel level.
storeBackup, the unconventional backup tool
storeBackup is a very versatile backup tool.
Let's do some electronics
Software to develop electronic circuits? Yes, it's available for Linux too. This article will show you what you need.
Test: pre-installed Linux Notebooks
This is a review of notebooks from linuxcertified.com
Understanding the Proc File System
The proc filesystem is a virtual filesystem which provides a lot of infromation about hardware and kernel internal data structures.
Going 3D with Blender: Modeling a chest
In this article we model a treasure chest with Blender.
Writing man-pages
This article explains how to write your own man-pages.
Book review: The Art of UNIX Programming
Review of the book "The Art of UNIX Programming" by Eric S. Raymond.
GIMP: Make your own brushes
This article explains the various brush types that Gimp has and shows how to create own brushes.
Temperature monitoring with Linux
This article shows how you can add for about 10 Eur a termperature supervision to your server.
Concurrent programming - Message queues (3)
This is the last article in the series about concurrent programming.
An ISDN - Fax with Linux
This article describes how to use your linux box as an ISDN fax machine.
Going 3D with Blender: A room with toys
In this third part of our series about Blender we set our train in a kid's room and model some more toys.
The MySQL C API
In this article, you will learn how to use the C APIs (Application Programming Interfaces) that come with MySQL.
Linux on the desktop: A computer for Mom
My Mom belongs to a generation which grew up without computers. This article is probably valid for most people who first started to use a computer beyond the age of 60.
Going 3D with Blender: A toy train
In this second article in our series about modeling with Blender we create a little toy train.
Automail for fli4l
How to fetch e-mail with a dial-on-demand one diskette router from www.fli4l.de.
A short guide to the installation of CVW under Linux
Collaborative Virtual Workspaces is one of the finest open source tools available for the development of virtual education.
Photo magic with Gimp
In this article we give you some basic ideas how to improve on your digital photos with The Gimp.
Collaborative Virtual Workspaces and their advantages
Some background information about a new virtual learing project at the Universidad Santiago de Cali.
IDS - Intrusion Detection System, part II
In this article we present methods to detect an intrusion and explain possibilities to respond to such and attack.
Building an autonomous light finder robot
In this article we describe how to build an autonomous robot that will always try to walk to the brightest spot in the room.
A GNUstep small apps tour
This is a very short review of some of the smaller but very useful tools from GNUstep.
A 1 Bit Data Scope
This article describes a 1bit logic analyser which samples data and sends it to a Linux PC via the rs232 port.
Product Review: Textmaker
Textmaker is one of the new commercial word processors for Linux.
Book review: Mastering Red Hat Linux 9
This is a review of the book Mastering Red Hat Linux 9. by Jang, Michael, Sybex.
GUI Programming with GTK - part 2
In this second part of the GTK series we will discuss boxes and tables.
Going 3D with Blender: Very first Steps
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 on it.
Implementing a scroller in SDL graphics
SDL is the simple direct media layer often used to implement fast and portable graphics.
Packet filtering with Linux
How to setup a basic firewall
Ximian Evolution installation guide
Ximian Evolution is able to read ans send mail from a Linux workstation via an Exchange server 5. In this article, I'll give you some info about my personal experiance and my own configuration.
GWorkspace, the GNUstep Workspace Manager
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.
IDS - Intrusion Detection System, part I
Case Study: Open Source Content Management Systems Make E-commerce Websites Affordable
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.
GUI Programming with GTK
In this article we will learn how to write graphical user interfaces (GUI) using GTK.
Concurrent programming - Message queues (2)
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. Starting from the theorical concepts at the base of multitasking we will end up writing a complete application demonstrating the communication between processes, with a simple but efficient communication protocol.
8cm-Multiboot-CDROM with modified Knoppix linux
This is an instruction how to make your own bootable mini CD.
Basic accoustics and signal processing for musicians
Everything about sound. The physics, wave forms, the human ear.... What is digital sound...?
Secure your connections with SSH
This article is an in depth description of SSH.
Bookreview: Beginning PHP4 Databases
This is a book from Wrox-press on PHP4
External attacks
This article presents the different types of external attacks that a cracker can use.
Measuring air pressure with Linux
This article describes an inexpensive solution to messure air pressure with a Linux PC.
Accessing PostgreSQL through JDBC via a Java SSL tunnel
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.
Linux USB LCD display with watchdog and buttons
This article explains how to modify the LCD display prestented in May2002 to work with the USB interface. The design is based on a chip from www.ftdichip.com
Concurrent programming - Message queues (1)
The third article on concurrent programming and UNIX inter process communication.
Managing HTML with Perl, HTML::TagReader
HTML::TagReader is a light weight Perl module to process a file Tag by Tag.
Intrusion detection with Debian GNU/Linux
The article presents techniques and the tools for Debian GNU/Linux to detect and track people wo broke into your computer network.
Demography hands on
This article presents a simulation program to answer the question "How will the population look in 50 or 100 years from now?"
Free Unix : the BSD one(s)
This aricle takes a look at the species "BSD UNIX".
Basic Programming with Unix
Review of Basic interpreters, IDEs for Basic, and and other things to build Basic programms under Linux.
Automating system administration with ssh and scp
This article demonstrates the usage of ssh and scp commands to automate system administration jobs, such as installing and configuring software on Linux systems.
Fighting against Spam
Spam between the mail!? Spam E-mail is growing at an alarming rate and it is a major problem for almost everybody.In this article we will explain ho w to handle unwanted commercial email.
Concurrent programming - Communications between processes
This is the second article in the series on concurrent programming.
A Microcontroller based DC power supply
In this article we build a very robust Microcontroller regulated power supply for your "lab" at home.
Mozilla dissected
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'.
Root-kit and integrity
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.
Fail Safe Port Allocation for Linux Device Drivers
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. The dynamically linked drivers, the developer should be careful to allocate unused range of port addresses for their device.
Gorm and ProjectCenter, the GNUstep RAD tools
Gorm and ProjectCenter are the Gnu Rapid Application Development tools for GNUstep
Developing Gnome Application with Python (Part 3)
RAD stands for Rapid Application Development.
(X)dialog: Talking shells
Xdialog and dialog a two classic utilities to enhance you shell scripts with a graphical user interface.
Using PGPLOT for interactive graphics under Linux
In this article you will learn how to build an interactive graphics program written in Fortran.
Installation of a LAMP-Systems
LAMP is an abbreviation for Linux Apache MySQL PHP. In this article you will learn how to install a Webserver based on LAMP.
Concurrent programming - Principles and introduction to processes
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.
Frequency counter 1Hz-100Mhz with LCD display and RS232 interface
This article describes how to design a frequency counter with the AT90S4433 Microcontroller and Linux.
Viruses : a concern for all of us
Viruses, Worms and Trojan Horses could also be a threat to Linux.
Using BibTeXML in DocBook XML to Write Scientific Articles
BibTex is an 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 XML.
Understanding HD44780 compatible LCD-displays
This article how the interface of a HD44780 compatible LCD-displays works at bits and byte level.
Midi with alsa
This article explains how to use your computer as a midi synthesizer.
FreeBSD, another alternative
This article is an overview over another free Unix system: FreeBSD
L'heure du Jazz++
Jazz is a midi sequencer with many interesting features for editing and composing your own music!
Hardware watchdog and shutdown button
This is a simple circuit to connect to the serial line of your computer.
How to secure an heterogeneous network with free tools
Security in computers networks is probably one of the biggest technology challenges of the 21st century. This article provides a general overview over the most important aspects.
Plugins and Mozilla RC3
How I setup Mozilla RC3 for Real Player, Acrobat, Flash, and a generic plug-in Plugger.
Receiving faxes with efax
Setting up Efax to send and receive faxes on RedHat 7.2.
Book Review: Beginning Databases with MySQL
A brief review about this great book about MySQL.
Compile your own Linux kernel
This a really comprehensive article that teaches you how to download , configure, compile and install your own kernel.
Light, Camera, Action... Kino!
Connect your digital video camera via firewire to Linux and start cutting.
Editing DocBook XML Documents
This article describes the use of Kate and its XML plugin as a tool for editing DocBook XML documents
A LCD control panel for your Linux server
In this article we use an Atmel AT90S4433 microcontroller and a few other inexpensive parts to build a LCD control panel for a Linux server.
Using the Minolta Dimage 5 camera under Linux
This is a short description on how to setup the usb drivers for the Minolta Dimage 5/7 cameras under Linux
GNUMail.app, the portability evidence
A NeXTmail clone able to run under GNUstep and MacOS X with the same source code
Getting to know XML
This is a short introduction to XML. You will meet Eddy the meta cat, the XML syntax police, and some DTDs. Don't worry, we'll explain ;-)
Introduction to cryptography
This article expains what cryptography is and how it works.
Discover the universe
This article introduces 2 program for Linux to explore the universe.
KDE 3
The new KDE3 is out. This article will give you an idea what it would be like to try it for yourself.
Replacing a Windows NT/2000 server using Linux and SAMBA
This article is is focused on a Linux system with SAMBA in order to run some services, typically provided by Windows operating systems.
Samba Configuration
This article describes the configuration of Linux-samba, a server needed to control domains of networks based on MS-windows machines. Examples given here are based on Debian GNU/Linux and Samba 2.0.7
GCC - the root of all
This is an introduction to using gcc as a compiler.
IOS, another REBOLution
Back to the future: IOS the internet operating system
Programming the ARV Microcontroller with GCC
The article explains how to setup a GCC development environment for the AVR 8-bit risc Microcontroller series from Atmel.
Book review: The qmail Handbook
This article is a brief review of "The Qmail Handbook" from Dave Sill.
Introduction to Ncurses
Ncurses is a library that provides function-key mapping, screen painting functions and the ability to use multiple non-overlapping windows on text-based terminals.
Setting up a Squid-Proxy Server
A proxy server can help to speed up an internet connection.
Game Review - Barrel Patrol 3D
Barrel Patrol 3D is a cute little 3d game, based on Ripoff, a classical arcade game from the early 80's.
Playing around with Dingbats and The Gimp
This article shows how you can create nice logos and images from Dingbat fonts with just a few clicks.
QCad: Technical drawing with Linux
QCad is a 2D CAD system
Running applications remotely with X11
X Window System is much more than just an environment to manage the windows of graphical applications.
Developing Gnome Application with Python (Part 2)
This article series is primarily written for beginners in the area Gnome and GNU/Linux. The author presents an educational tool to write Gnome GUIs using Python.
Chrooting all services in Linux
Chrooted system services improve security by limiting damage that someone who broke into the system can possibly do
MySQL and Perl, the marriage of convenience
Using MySQL in conjunction with Perl is an old story, but still a good one.
Writing CDs with Linux
In this article we describe how you can write CDs under Linux.
Linux System Administration - A User's Guide (Book Review)
This is a review of the book titled "Linux System Administration - A User's Guide" by Marcel Gagne. The book has 532 pages and 26 chapters that cover installation, daemons, run-levels,file systems, password policy, kernel building, printing, devices, backups, network administration, secure computing, and more.
Freefont, True Type and Patterns with The Gimp
This article shows how to use even more fonts and patterns with The Gimp.
Gimp : Using layers and their masks
Mask layers from Gimp are a really universal tool for all kind of tricks.
Yellow Pages (Part III)
In this last article about NIS, we explain how to install a NIS server. We will see which programs are used, configuration files and the building of the database.
Security holes - Part VI
Security of CGI scripts
Nessus : another brick in the (security) wall
Nessus is more than a single security scanner
Analyzing your internet applications' log files II - configuring your reports
The first article in this series introduced Lire. This article will show you how you can configure your reports for your need.
MosixView, a management-GUI for MOSIX-cluster
This article describes a management GUI for the MOSIX-Cluster technologie (www.mosix.org)
Atek Super Mini Optical Mouse
This is a miniature mouse that makes your notebook perform like a desktop
A whole new world: A guided tour with Tux through the land of the penguin
Explore the land of the penguin with Tux as a guide on your side.
How to use your ATEN UC-232A USB adapter with Linux
The ATEN UC-232A is a RS232 serial line to USB adapter.
XMRM: Multi Resolution Morphing
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.
Security holes - part V
This fifth article is about race conditions :what they are, how to avoid them ...
Using XML and XSLT to build LinuxFocus.org(/Nederlands)
This article shows you how parts of the Dutch website of LinuxFocus is generated with XSLT tools from the XML database. It compares this with the (very) much slower DOM tools in Perl.
Analyzing your internet applications' logfiles
This article is the first in a series about using Lire to analyze log files of internet server applications. This is not limited to one service, e.g. Apache, but is an integrated analyzer for many different services. Included are DNS, WWW, email and ipfilter services.
Psionic Portsentry 1.1, the defender of the ports
Port scan detection and active defense
E-mail over UUCP: The professional solution for dialup users
UUCP is an old protocol but it is very good to handle E-mail over dialup connections.
Shell Programming
In this article we explain how to write little scripts.
Yellow Pages
The Network Information Service (NIS) manages a data base on server. Each computer on a network running a NIS client NIS can then poll the server for informations (login name,password, users and groups informations, ...).
Yellow Pages (Part II)
My previous article was an introduction to the yellow pages and RPCs. This one explains how to configure a NIS client, how this client works and a small introduction to the different tools coming with NIS. Finally, we'll have a few words about NIS+
Learning with nmap
nmap is a security scanner
Security holes - part IV
This fourth article deals with format strings security holes
Singing in the web... with Opera 5.0 for Linux
Review of the new improved version of one of the lightest browsers
Bookreview: Professional Perl Programming
This is a review of the book Professional Perl Programming from Wrox Press.
Compiling, Configuring and Installing a fully-working Customized Linux Kernel
This article provides you with an extremely detailed and step-by-step process describing how to Compile, Configure and then Install a Customized Red Hat Linux Kernel.
Wacky uses for Raid, /dev/ram, and ramfs
ramfs is a new file system in the 2.4 Kernel. It is very simple but could have some interesting applications.
Do magic with images on the shell
This article explains how to automate image processing with the shell and ImageMagick
Make it anywhere with make!
This article explains how "make" works. It shows that "make" is more than just a command to compile software.
Security holes
This article explains how to exploit badly programmed software by using buffer overflows.
Game Review - GLtron
3D variant of those games, featuring the light-cycle race from the movie "Tron"
Introduction to BORG
BORG is graphical user interface to BMRT, but it is not just a GUI it divides the rendering work across different computers where BMRT is used to render frames.
Through the tunnel
Using free SSH with external applications on different OSes
Real-time mp3 recording, part II
In the first part we showed how you can record in mp3 in realtime, for example a radio show, and make a big file out of it, e.g. 650MB for 24 hours of music in near-CD quality (128 kbit/s; stereo). Now, what to do with such a big file? Can we make even bigger files, or could we maybe get a better compression rate? How about the quality of these mp3 recordings?
Building a Linux-controlled walking robot
In this article you learn how to build a small walking insect and control it with Linux over the parallel port.
POVRAY IV: The Use of Textures in Povray
Here we build a study room with different items on the table. We build the scene by extensively using textures.
Real-time MP3 recording
Recording music in mp3-format gives you the possibility to record very long pieces of music without exhausting the disk-space.
Security Holes - part II
This second article is not directly related with the subject of the series. It reviews some concepts before describing the fear of all the system administrators:Buffer Overflows. We shall see how the memory is organized as well as the stack and how a function call is performed. Then we present a tool used for every intrusion attempt: shellcode.
Using different ISPs for your Internet access
In this article we develop configuration files to easily change between a number of different Internet Service Providers. We extend the configuration not only to one PC but to a whole network using IP masquerading. A DNS proxy will be used to make the changing DNS IP addresses invisible inside the masqueraded network.
Game Review - Penguin Command
"Missile Command" clone with better gfx and sounds
GNUstep, the open source OpenStep
An object-oriented framework
Install a fax server the easy way
This article explains how to install hylafax, a fax server, on a linux box
Book Review: Beginning Linux Programming
This is the review of a "Linux programming bible" published by Wrox press.
Realtime data mirroring on Linux
This article will explain on how to set an inexpensive real.time data replication system on Linux without need of special hardware. This kind of replication will be especially useful for ISPs or webhosts.
Tools selection with Gimp and color correction
This article explains how to use Gimp's powerful selection mechanisms.
Automount and autofs
Automount and autofs are powerful tools and ease file systems management.
Multicast
This article is an introduction to multicast technologies on TCP/IP networks.
Slackware 7.0 part II: Configuration Guide
After the installation in the first part, the author now describes some basic configuration tasks in his now favorite Linux distribution. He explains how to configure X, how to compile a kernel (and how to use it with lilo), how to do user account management, how to dial in to internet and how to give your system some basic security.
Security tools
Free tools to harden your systems
Security Holes - part I
This is the first article of a series of articles on security holes that can appear within a program. The series will show how to avoid security holes if programming habits are slightly corrected. We shall first discuss privileges, UID and EUID in this first article before dealing with the execution of external commands.
A serial line shutdown button with control LED
In this article we design a little push button to connect to your server on the serial line and which you can use to shut the machine down when needed.
BOOK REVIEW: HTML & XHTML, O'Reilly
Review of the book HTML & XHTML published by O'Reilly
Game Review - Tux Racer
Tux Racer is a fast pace arcade game. Our favorite Linux mascot has to slide down snow-covered hills,trying to catch as many herrings as possible and finish the courses in time.
Discovering Ted
Ted is a very nice and light weight word processor
GNU utilities
The GNU utilities are a set of standard UNIX commands available with almost every UNIX system.
Network File System (NFS)
Network File System (NFS) is a tool to manage files spread among several computers on a network as if they were on the same local machine. So, the final user does not have to worry of the exact location of its own files in order to access them.
An Introduction to Tk
This articles explain how to build a graphical interface using the Toolkit of Tcl: Tk. The reader should also appreciate the simplicity of this toolkit compared to usual X-Windows libraries.
xinetd - extended Internet services daemon
xinetd - extended Internet services daemon - provides an excellent security against the intrusions, and limit certain risks of attacks by Deny of Services ( DoS ). It allows, just like the most known pair ( inetd + tcpd ), to set access control to a computer, but its capacities extend well beyond. This article proposes you to discover them.
Once upon a time... or commercial Unix vs free Unix
Why choosing between a commercial or a free Unix
High Availability systems under Linux
What is High Availability, why it is important and how to implement it using Linux.
Slackware 7.0 part I: Installation Guide
The author describes in detail the installation of the Slackware 7.0 Linux distribution. This article is written for beginners.
Magicpoint
This article reviews the possibility of MagicPoint. This software is one of the very few that allow creation of presentations under X-Windows.
Bastille Linux
Available by the beginning of june,version 1.1 of Bastille-Linux is not a new Linux Distribution but a set of security scripts. The authors have adopted a very pedagogic approach and one can learn a lot simply installing these scripts.
Book review: Professional PHP Programming
This article,reviews the book Professional PHP Programming,a Programmer to programmer collection from WROX press.
Approaching Vector Linux
Review of a mini linux distribution
REBOL the rebel
Let's say REBOL is a messaging language, but as a matter of fact, it's much more than that.
Reporting bugs on Debian 2.2
How that Debian 2.2 is released, a lot of people will upgrade to new newest Debian distro. Since Debian is extremely stable, why do you need a bug report tool? I do not know, but you cannot write software without bugs, so bugs will be found. This article explains how to submit them to the developers of the package.
Building Scalable ISPs with opensource softwares
In my last article, I introduced you to using LDAP on Linux. In this article, we will build a scalable ISP that can scale from one to any number of backend machines. The backbone of setting up this ISP is LDAP.
Pseudo 3D with Gimp
How to use Gimp for 3D graphics
Virtual Network Computing
The dream of the network administrator come true
An Introduction to Perl's XML::XSLT module
This article demonstrates some of the capabilities of the W3C's XSLT standard and how it can be used to help you manage and publish XML documents to the web.
Using LDAP under Linux
This article will talk about the benefits of deploying LDAP in an organization and how to implement it on Linux.
Developing Gnome Application with Python (Part 1)
This series of articles is especially written for beginner in Gnome programming and GNU/Linux.
Installing Debian packages of LinuxFocus
Article on how to install the Debian package of LinuxFocus.
Using Serial Line LCD displays under Linux
This article show how to use the BLC2021 PC-Bay Insert serial line display from Matrix Orbital under Linux.
Apache : Part I
This article is an introduction to the HTTP protocol it takes also a look at the history of the World Wide Web.
Sendmail and Fetchmail: A local mail server.
Sendmail is a powerful but complex software. This article explains how to configure sendmail and fetchmail for use on a typical home computer.
Arkeia, a professional and commercial network backup solution
Arkeia 4.2.3-1 is the latest version of a commercial and professional network backup solution from Knox Software.
Building DHCP automatically
This article explains how to configure easily DHCP on a network.
Setting up IP-Masquerading
IP-Masquerading provides the possibility to connect several computers to the Internet using a computer running Linux with just one public IP address.
Making PDF documents with DocBook
This article describes how you can use DocBook to develop PDF documents and covers tools you need to edit DocBook articles and tools to translate them to PDF documents.
Mastering the VI editor
The VI editor is a screen-based editor used by many Unix users. The VI editor has powerful features to aid programmers, but many beginning users avoid using VI because the different features overwhelm them.
Linux RT, part III
In this article a simple electric circuit is used to process commands from any infra-red remote control.
NEdit, the universal editor in Unix world
Nedit is a remarkable editor. Unfortunately it is not included in most Linux distributions and therefore not as well known as other editors.
Product review: SNiFF+ for Linux
SNiFF+ is an integrated development environment for Linux. TakeFive Software provides a download version (limited to 200 files) free of charge.
Booting three different operating systems: RedHat Linux 5.2, SCO Openserver 5.0.5 and Windows NT 4.0
Edgar explains how to setup one PC boot to boot 3 operating systems.
The uCsimm kit
This article describes the uCsimm kit and the UClinux project: Porting the linux kernel on hardware without MMU (memory management unit).
Using Apache ProxyPass to access servers behind a Masquerading
This article demonstrates how to make a webserver behind a firewall available on the internet without changing rules on your firewall or compromising security.
FSViewer, a File Manager for WindowMaker
Among the revolutionary tools of NeXTStep, the first in order of appearance on the screen was indisputably the File Viewer. Thanks to the path-view in that File Manager you always knew where you were. It was more than a manager, it was a true browser. FSViewer is a NeXTStep a like File Manager for WindowMaker.
WindowMaker the spirit of NextStep
Window Maker 0.61.1 is the latest release of a NeXT look-alike window manager.
Recycling Ip Addresses with Apache
This article demonstrates how to serve multiple virtual web servers using the same Ip address with Apache on Unix/Linux.
VXE, a Linux security tool
Serge Lozovsky presents a software package that he developed to make UNIX systems more secure.
Home Networking, glossary and overview
This article explains hardware and networking terminology
How to partition your hard drive for Linux
Thomas explains how he has chosen to partition his hard disk.
Perl part III
This article explains how to use arrays in Perl.
Creating fire effects with The GIMP
In this article we show a procedure to create fire effects with The GIMP in five steps
Game Review - FreeCiv
FreeCiv is an open source clone of Sid Meier's popular Civilisation
Tux's secret obsession - Gaming under Linux
This is a short overview over the gaming scene under Linux.
Sketch, vectorial drawing under Linux
The advantages of a vectorial representation over bitmap is that files are smaller and the image can be enlarged significantly without differences in rendering (pixellisation). Sketch is written in Python, an object oriented interpreted programming language.
How to use a Ramdisk for Linux
This article shows how to use RAM as a virtual harddisk.
Speeding up small databases on Linux
A Ramdisk can be used to make small PostgreSQL databases really fast.
Perl II
In the second part of the Perl tutorial we write our first real program.
Awk
Examples on how to use AWK
Nerdbank - a banking initiative for open interfaces
Nerdbank is a project to develop an open and secure banking system for worldwide electronic money transactions.
How to use your CD-ROM under Linux
This article gives a short but useful description on how to use your CD-ROM under Linux.
Dialog - a programming language for dialogs
Dialog is a programming language to program dialogs in games and computer simulations
The Tcl Syntax
This article explains basics concept and syntax of the Tcl language
Building text files with m4 macros
This article shows how to use m4 macros
Perl I
This is the start of a Perl tutorial
Interview with Dennis Ritchie
Dennis Ritchie is the one who developed C and Unix.
PostScript Part II: The Operand Stack
The author describes the operand stack of the PostScript language. The stack manipulations and mathematical operators are presented here.
RenderMan Part III
This article discusses he possibility of modeling and animating a scene using C or C!+
f-CPU Project: Attempting the "even harder"
The fPU project attempts to develop a microprocessor like the present ones allowing a development scheme close to the one guiding important free software projects.
Japanese on Linux Part I
This article takes a brief overview at how to make your Linux system Japanese-capable.
PostScript III, Arrays, Variables, Loops and Macro Definitions
This is the continuation of two previous articles about postscript.
How to remove windows
This article describes how to remove Windows and give the disk space to Linux without re-installing it
Funny shell commands
Some interesting answers form your Unix c-shell
An auto guided Vehicle Based on Linux
This ariticle describes a Linux based robot as developed at the Universidad Politecnica de Valencia
Installation and Configuration of a Raid-system
RAID (Redundant Array of Inexpensive Disks) consists of a series of systems to organize several disk drives into a single entity that behaves as a single virtual drive but making the various disks work in parallel thus improving the access performance and saving the information stored from accidental crashes.
Happy Hacking Keyboard
Product review of the Happy Hacking Keyboard
PG2CGI Access to Databases from the Web
We describe a new program that allows one accessing a database from HTML pages.
File Access Permissions
This article is divided into two parts: The first part (Basic file access permissions) is a very short introduction to the basic file permission concept under Unix. The second part (T-bit, SUID and SGID) covers more advanced features of Linux that go beyond the basic "read-write-execute" flags.
Java. Part II
The second part of a tutorial about java
Basic UNIX commands
Simple introduction to some of the basic UNIX tools
Interview with David Bagley
David Bagley is the current maintainer of xlock, a popular X Window screen saver and locking utility.
GNU/Linux on Fujitsu 635T
How to install Linux on a Fujitsu 635T laptop
Linux on a Sony Vaio 505gx
How to install Linux on a Sony Vaio 505gx
Easy Graphics: A Beginner's Guide to SVGAlib
SVGAlib is a simple graphics library that works without X11
Linux as an Educational Tool in Undergraduate Labs
The author describes a first hand account of how Linux is changing the face of research labs in educational institutions in Turkey.
An Introduction to Network Booting and Etherboot
An advanced article that explains how to bootstrap your computer from a program stored in non-volatile memory without accessing your hard disk.
Finding Files
How to search for files by name or content.
Enabling Chinese on Linux
This brief article describes how to enable Chinese locale on a "standard" Linux box.
Interview with Juan Jose Amor
Juan Jose Amor Iglesias Current coordinator of the LuCAS project, part of the LDP and devoted to the translation and localization of MDL manuals in Spanish
Design of Recursive Structures. POVRAY III
The author explores the use of iterative structures within POVRAY and the beautiful images that they can generate.
Creating and Editing Animations with GIMP
Simple techniques to create and edit animations using the Gimp
Enlightenment
Enlightenment is a highly customizable window manager for Linux. This article discusses the features, installation, and customization of the Enlightenment window manager.
Regular Expressions
Regular expressions are advanced search patters. This Article gives an introduction.
Linux among artists at BUF COMPAGNIE
BUF Company is a major synthetic image maker in the film business.
The StarOffice Suite
This article looks at the word processor in StarOffice
Real-Time Linux II
In this second issue devoted to RT-Linux I will try to offer a more practical view of RT-Linux.
Programming with Java. Part I
This is the first article in a series about Java programming. The first part will describe Java as a language, its general characteristics and the location of the most relevant sources of information.
SQL Tutorial Part II
Part II of the tutorial reviews several basic statements of the SQL language.
MySQL. A Database Server
MySQL is an SQL (Structured Query Language) database server supported by a number of platforms, including Linux. Its Linux version is design with fast performance in mind.
Adding Security to Common Linux Distributions
How to modify a Linux distribution out of the box to get better security.
TCPD and Firewalls using IPFWADM
This article describes very briefly how to configure the inetd services in order to improve security on your system. We concentrate in the of the tool IPFWADM to administer and configure inetd services
RenderMan: Basics on Camera Positioning
Although the positioning is not as intuitive as Pov-Ray, it has an advantage when describing camera trajectories.
MindsEye: 3D Modeling
About 2 years ago, when linux was still very much a hackers operating system, the idea popped up to start work on a renderer/modeler/animation program for Linux.
Writing Text with Gimp
The graphics corner continues to review and compare two good Image manipulation tools: Photoshop and Gimp. Our reviewers explore the creation of text banners.
Creating a (Somewhat Useful) Version of Linux
Follow this article and learn how to create your own set of boot/root disks under Linux.
Introduction to SQL. (SQL Part I) and installation of PostgreSQL
A SQL tutorial intended for novice database developers.
The X Display Manager
The X Display Manager runs as a daemon on a host machine and manages multiple X displays.
StarOffice for Linux
This article reviews the applications available in the suite StarOffice 4.0. The author gives us a demonstration using tool for the creation of presentations. (functionally similar to Microsoft's Power Point).
Microsoft Windows NT Server 4.0 versus UNIX
The goal of this article is provide managers in corporations with the data and comparisons necessary to make well-informed decisions concerning the installation of servers for the corporate environment. All the information presented in this article summarizes the experience of a number of information systems professionals.
RenderMan
Who has not heard of Pixar? Who has not seen "Toy Story"? Pixar developed RenderMan.
The Postscript Language
This is the first one of a series of articles about PostScript.
Real-Time Linux
Basic Concepts of Real-Time.
Introduction to DNS
You may have wondered what happens behind the scenes in Netscape after you enter a URL. This article will help you to understand the name-lookup process.
OpenGL: the 3D Scene
Explore the bolts and nuts of 3D rendering with OpenGL.
GLUT: using Menus
Our GL Utility Toolkit series continues, examining the windows menu programming interface with a simple example.
POVRAY II: Basic Notions
This is the second article on a series about Povray. This time we review some general concepts and start describing the basic elements of the language.
Writing Text with PhotoShop
The graphics corner continues to review and compare two good Image manipulation tools: Photoshop and Gimp. Our reviewers explore the creation of text banners.
Hardware Review: OpenGL & GLUT with Voodoo 3Dfx in Mind
How to program OpenGL on a Voodoo 3Dfx graphic card.
Configuring X
What are all those dotfiles for anyway?
Interview with Miguel de Icaza
Miguel de Icaza gives us an interesting peek at a selected group of linux kernel developers. He is involved with the Linux/Sparc, Gnome project and RedHat's Lab.
Through the Window
Some notes about window managers.
Interview with Linus Torvalds
Linus Torvalds talks about the past and future of Linux and shares his opinions on current events
OpenGL Programming: More about Lines
The Author describes more of the line rendering capabilities of OpenGL
GLUT Programming: Windows Management
This article explains the usage of the GLUT windows management sub-API
POVRAY I: First Steps
This article begins a series about the Povray raytracer.
Lyx Review
Lyx is an editor with fantastic possibilities. Ismael gives us a little overview.
Building, Installing and Configuring sendmail 8.8.x
This is a copy of a Mini HOWTO on sendmail
Graphical Photo composition with Photoshop
A comparison between Photoshop and Gimp
Graphical Photo composition with The Gimp
A comparison between Photoshop and Gimp
Straight from the Horse's Mouth
Bill Gates on customer support
Enabling Profile on the Alpha
Tips for users of a DEC-Alpha
Setting Up a ZIP drive on an Alpha platform
Tips for users of a DEC-Alpha
ECC2-79 cracked: Alpha Linux did it
A short note about a group of Alpha Linux enthusiasts who cracked ECC2-79
Mail From Our Readers
E-mail feedback after the first issue of Linuxfocus went out
What is OpenGL?
This article is the first in a series about OpenGL, perhaps the most successful API for high-end 3D graphics
GLUT programming:Windows and Animations
GLUT is the GL Utility Toolkit, developed by Mark Kilgard. In this article the author introduces GLUT, and gives us a primer on Windows and Animations handling with GLUT.
OpenGL Programming:Simple Polygon Rendering
The author describes the first steps into any OpenGL application and tells us how to render simple polygons in 2D.
3Dfx graphics card
3Dfx Interactive's 3D chipset is changing the world of high-end graphics.
Kernel Secrets
A short description of the Linux Kernel.
Debugging Code with ddd
ddd is a wonderful graphical debugger.
Network Management and Monitoring with Linux
Some handy tools for managing today's ubiquitous networks
Getting Linux to Run a Computer with an Alpha CPU
The author share with us his experiences putting together an Alpha PC
What is Linux?
A brief history of Linux
Installation of Manpages-es
How to get man-pages of the most important Linux system commands in Spanish.
Connecting to the Internet
Here we have something lots of users face up to in their early stages of setting Linux up: Connecting to the Internet.
I got Linux Installed, What next?
This article introduces new users to some of the issues that he/she will confront upon installation of Linux.
Some Tips
Well...here are some notes, tricks, some of these are specific to non-english speaking users and therefore not frequently answered in the common documentation.
Making Shared Libraries
How to compile and generate shared libraries.
PGP Under Linux
The author gives an introduction to PGP.
Managing Your Mail with procmail
Keep you mail on folders, respond automatically, create mailing lists, learn how to do these and much more with procmail.
Linux in Hospitals
Linux means business, an example of using Linux in the health care environment.
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