For some reason, the erasedups option for bash history appears to have stopped working. Until I work out why and fix it, I wrote this PHP script to perform the same function.

Before starting, it's a good idea to run a disk check. Run the following command to create the necessary file and then reboot:

If you are setting up version control, and have access to a managed server, you may decide to create your central repositories on that server, so that all developers can access the repo from wherever they are: in the office, at home, on the beach etc etc

Many managed servers use CentOS, the commercial version of RedHat Linux. If you can find a source repo with git in it, you can install using yum:

The PEAR PHP_CodeSniffer project provides an invaluable tool for enforcing a consistent set of coding standards across a whole PHP project. Thanks to the guys at PHPsrc, it can now be installed as an Eclipse plug-in, to provide annotations about code standard violations right in your editor:



In order to get this set up and running, you first need Eclipse 3.3 or greater. You can

Mailman is a tried-and-tested Open Source mailing list manager. It's robust and reasonably efficient when running, however it organises lists internally by their local name only. In other words, you can't have one list called maillist@domain.org on the same server as another list called maillist@somewhereelse.com on the same machine, unless you have a separate mailman installation for each domain.

Many production environments do appear to use the separate installation per domain

Microsoft have a wonderfully long history of badly designed software that they're proudly continuing to this day with the abomination of IE 9 and the ghastly sham that is Windows 7. It's a tribute to the skills of the many hard-working marketing heads over at Redmond that despite the poor quality and the easy availability of superior cost-free alternatives, people the world over keep coming back to Microsoft like hookers on crack.

IEs4Linux

Web pages have become increasingly dynamic in recent years, with more and more content being fetched, manipulated and saved in the background with AJAX. This breaks the traditional connection between the URL and the displayed document: no longer does a URL refer uniquely to one single document. This causes problems for users, because browsers use the URL when storing pages in history. Browser history is implemented as a stack, a last-in, first-out (FIFO) structure. As you navigate through the

Compiling from .tar.gz

First set up the tunnel like so:

If you're running Alsa on your Linux distro, without pulseaudio (e.g. Arch Linux, SUSE), and your onboard audio only has 3 Jacks - Line In, Speaker, and Mic - but supports 5.1 audio, follow these steps to enable it.

Add the line below to a file called /etc/modprobe.d/options. If the file doesn't exist, create it.

The MySQL SET datatype is a very space-efficient way to store sets of binary flags. It's a little like the ENUM type, in that you define a range of possible string values, but unlike the ENUM, a column that holds a SET can have any number of the string values at one time.

It's useful to consider how MySQL stores SETs and ENUMs in order to appreciate what benefits they can bring.

Here's a simple table with an ENUM column and a SET column:

There's a lot of articles on the web explaining how to move a Linux home folder (containing all the user accounts) from the system partition onto its own partition.

I wanted to do the reverse procedure, and move my separate home partition to a regular home folder on the system partition. The only problem is that home can contain a variety of files and symlinks that wouldn't all get copied correctly with the mv command. The

With later versions of Eclipse and/or the SVN plugin, you have the option of using the Java native interface (JNI) library for Subversion support. For performance and platform independence, Subversion is written in C. The JavaHL library is written by the Subversion team, and basically provides Java wrappers for Subversion's C API. You can use SVNkit, which is a pure Java Subversion library, but until you've sorted it out one way or the other, you're likely to see lots of error messages reading

Oolite is an open source space trading sim based on the original Elite game written by David Braben and Ian Bell in the mid 1980s. At its time, Elite was a ground-breaking game, with a seemingly enormous galactic map of stars to navigate, and loose open-ended gameplay.

The Oolite project has recreated the original game using OpenGL textured models, and the source code can be downloaded from

The pspell_* functions are a very useful feature of PHP, allowing you to scan text and highlight words which are potentially misspelt. Pspell implements the open source aspell spell-checking routines in PHP.

Basic Usage

G3D is a cross-platform OpenGL library in C++. I haven't used it in a couple of years, when I first experimented with 3D C++ programming. The current version is 8 beta 2.

To install on Linux, you'll need to compile the G3D code from source. In my case, on Ubuntu 9.10, I had to install the following dependencies first:

Natural vs Surrogate Primary Keys

JQuery has a few transition animations built in, such as the 'blinds' effect. This lets you unhide content by revealing it as if a blind were being pulled open in front of it, and vice versa to hide content.

I've built a variant on this idea that gives the effect of a venetian blind:

There are a myriad free libraries out there that offer JQuery image rotator functionality. The idea is simple enough - cycle through a series of images, smoothly transitioning between each using some effect or other.

So why code your own? Simplicity and control are the main reasons. Unless you're already loading up a 3rd-party rotator library, why add to the bandwidth overhead? Some of those libraries can be quite time-consuming to get to grips with, so a roll-your-own solution can

Under the hood, there are multiple performance improvements in MySQL 5.5. These mostly target the InnoDB engine, but there are several that will improve MyISAM tables. However, InnoDB becomes the default storage engine from version 5.5 onwards. InnoDB supports true ACID Transactions (groups of statements which are only committed if they all succeed), Referential Integrity (which enforces foreign key constraints on a DB level), and improved crash recovery. The cost is increased disk space usage,

It's worth routinely checking your hard disks to alert you in advance of an impending disk failure and to tidy up orphaned blocks should they occur (very rare). For normal home users, who of course keep back-ups of important files in other locations, running this check once a month is sufficient, which you set using fs2tune.

However, in Arch Linux the fsck disk checker does not offer the option to abort a disk check once it has started. In Ubuntu for instance, you are told to press

Note that when using grub commands, spaces are important. In particular, a space is required after the commands root and setup (but before the first bracket) and no spaces should be used inside the brackets.

1) Boot from a Live CD
2) Open a terminal window or switch to a TTY and enter:

Can now be done via PECL. PECL is a part of PEAR, so install that first:

When a couple of colleagues got Arduinos, I finally got round to getting hold of a starter kit off ebay. It's a very simple kit, with a breadboard and a selection of components that include resistors, capacitors, LEDs and transistors. It also had a couple of circuits pinched off the web to get you started, and they seemed as good a place as any to get started.

With the first one, two LEDs blink on/off alternately. The circuit comprises the following components:

• LED x

The Arduino is a microprocessor module released under Open Source principles, meaning that the designs are published and may be implemented with or without additional modification by anyone without having to pay licence fees. The core of the Arduino design is the Atmel megaAVR CPU, a proprietary CPU produced by Norwegian company Atmel Semiconductor. The Arduino board adds I/O support, exposing the megaAVR's I/O lines as standard connectors, which allow the board to be easily connected to a

Artificial Intelligence begins with the study of intelligence in biological systems and takes the knowledge and theories gained from that to engineer systems which exhibit intelligence. Neural networks are a perfect example of this: abstract mathematical models of the neurons that make up the brain. In some cases, neural networks are used in research to model the brain, and in these cases the aim is to make the artifical neurons resemble their biological counterparts as closely as

phpDocumentor is a tool written in PHP to create complete documentation directly from both PHP code and external documentation. Well-written PHP source code practically serves as its own documentation. phpDocumentor taps into this by examining code for all kinds of structural hints, such as files, classes, functions, constant definitions, global variables, and class variables/methods. From this, it creates basic documentation in a traditional manual format. Note that you will need at least

With all the plug-ins freely available for it, Eclipse is rapidly becoming the one-stop IDE of choice for all your programming needs. The Perl plug-in from EPIC (Eclipse Perl Integration) is compatible with Eclipse v3.1 and higher:



You need Perl installed on your system in order to make use of all the plug-in's features, such as syntax highlighting and source

Recently I changed the name of the mountpoint where my Eclipse projects are located, and while a lot of my projects opened without any problem, others would not, instead generating the error message:

The project description file (.project) for PROJECTNAME is missing

By default, Eclipse will look for the .project file in the root directory of the project itself. In some cases though, you may want to have the

I would like to have the following features in Jabber chatrooms:

- system notification when user says any one of a list of trigger words (i.e. nicknames)
- ability to 'silence' selected people, so that their messages do not trigger sounds
- ability to mark people as 'special', so that whatever they say a system notification will be created (regardless of whether or not they use one of the trigger sounds mentioned above)

The last two could be combined into a

The differences between these two plugins are varied but subtle. After having used phpEclipse for the last couple of years, I decided to give PDT a proper try as I needed to do a fresh install in order to get the PHP CodeSniffer Plugin working fully.

PDT

• Excellent HTML validation, and built-in CSS support (code highlighting, intellisense and autocompletion for

Closing HTML Tags for a snippet

From http://www.webmasterworld.com/forum92/3366.htm:

The situation is this: A single server with multiple IP addresses and related hostnames acts as a mailman server. Mailman is a mailing list manager with a builtin web archive and subscription management system written in php. As shipped it injects a file called mailman.conf into /etc/httpd/conf.d that uses mod_alias to redirect

My first task is to investigate how we can create a single consistent look & feel for the admin GUI. I'll need to get a good understanding of how the admin GUI works and is organised.

When the admin first logs in, you have a grid of square buttons on the left, and some stats on the right. The page shows as index2.php in the address bar.

index2.php has the following structure:

• includes
• start

The aim is to provide a resource where developers can go in order to get code for a specific task.

Objectives

1. To reduce time from design to deployment
2. to help maintain code quality
3. to reduce need for maintanence and support
4. to help ensure code meets specific requirements (including FF support, security, performance)
5. to facilitate group work through standardization
6. to grant designers the ability to

The MDSN samples include a C++ project for building a ISAPI DLL which performs authentication for web resources against a text file. This project, AuthFilt, is one of the samples supplied with the .NET Platform SDK, available from here. Once you've installed the SDK, the sample code is located in the AuthFilt folder at

The main problem this car has suffered since I bought it has been its poor idle. For the first six or so months, it ran absolutely fine, but then it began to stall regularly when idling, and it's steadily got worse. Even now it's got warmer has not improved, and happens equally whether the engine is warm or cold.

The stalling problem did not appear to be a physical issue with the overall running of the engine which remained smooth and even when under power. It appeared to be more to

Right, so now I've checked everything is set up correctly, I've decided to take a look at the examples that come with the G3D library.

There are seemingly eight, described on the G3D web site; it's not clear if there's any natural progression through them.

• ArticulatedModel
loads models from files in 3DS, IFS, and PLY2 formats. Creates a scene graph, uses 'Pixel Shader 2.0' and 'fixed

This little program allows you to create IFS models suitable for use in G3D programs. An IFS model can be built from an array of vertices with an associated array of indicies. The indices refer to offsets in the vertex array, and are grouped in sets of three - representing the triangular faces of the model.

So far, my program allows you to:

• Add a new vertex at the origin
• Select a vertex with the TAB

I now feel I'm ready to have a go at creating my first simple OpenGL game. It's going to be pretty simple - there'll be no scene graph, just a simple array for storing objects in the world. I won't implement frustum culling either, at least not in the first instance.

My game will be based on space flight, so I will start with the player's ship. It should appear just in front and below of the camera, i.e. third person. It should turn and dive/climb in response to keyboard input, and

Regular Expression Principles

Data Storage