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March 2008

Notes d'information - ejabberd

Liste de contacts partagés - « Shared rosters » Les listes de contacts partagés forment une nouvelle fonctionalité qui permet aux administrateurs d'ejabberd d'ajouter des utilisateurs jabber qui seront présents dans le roster de tous les utilisateurs du server.

Authentification Ldap

Ce bout de code vient juste après l’article sur l’installation de ejabberd, test de l’authentification ldap. Ca fonctionne très bien ! Il suffit de modifier le fichier de conf /etc/ejabberd/ejabberd.cfg

February 2008

Using Nagios to Monitor Networks

Nagios is a powerful, modular network monitoring system that can be used to monitor many network services like smtp, http and dns on remote hosts. It also has support for snmp to allow you to check things like processor loads on routers and servers. I couldn't begin to cover all of the things that nagios can do in this article, so I'll just cover the basics to get you up and running.

eeeXubuntu [EeeUser Eee PC Wiki]

by 1 other
eeeXubuntu is a custom version of the Xubuntu 7.10 Live CD with fully-integrated hardware support, including native wireless drivers, functioning Ethernet support, tweaks for low-resolution desktop environments, and other miscellaneous fixes. Wherever possible, these changes are incorporated using custom .deb packages rather than spewing assorted files all over post-install. (Screenshot) The goal of this project is to maintain a easy-to-install Xubuntu Live CD image for the eeePC, allowing for a reliable base Xubuntu install. One strong advantage of development for the eeePC is a common hardware platform shared by all users. (Those who are missing a miniPCI slot may, of course, disagree.)

How to get your MySQL Munin Graphs working

I run a few cPanel servers and run Munin as my resource monitor. At the time I wrote this the version included with cPanel was munin 1.24. Ever since I have installed the plugin from cPanel it would monitor MySQL upon first install and then stop if the server was reboot. Uninstalling and reinstalling would once again get Munin to monitor MySQL but having to uninstall and reinstall just for a reboot, just did not seem like something that you should have to do. After many months of on and off testing this is the fix I have come up with.

Installer et configurer OpenVPN sur Debian 4.0 Etch

OpenVPN est un logiciel permettant de créer des réseaux privés virtuels sans utiliser des technologies telles que PPtP (Microsoft) ou IPSec. Il est de plus disponibles sur de nombreux systèmes d'exploitation (Microsoft Windows, GNU / Linux, MacOS X, ...). C'est une solution simple pour gérer un réseau privé virtuel composé de machines hétéroclites dans un environnement n'autorisant pas IPSec.

Howto Install Sun Java on Debian Etch

This small guide shows how to install the original Sun Java 2 Platform Standard Edition 5.0 JRE (Java Runtime Environment) and JDK (Java Developer Kit) on Debian 4.0 Etch

Automatic Proxy Configuration

Proxy Auto Configuration (PAC) The involves creating a javascript script to return which proxy servers to use. The script needs to define the function which will be called by the browser for every URL that is retrieved:

Monitoring Servers and Clients using Munin in Ubuntu

“Munin” means “memory”.Munin the tool surveys all your computers and remembers what it saw. It presents all the information in in graphs through a web interface. Its emphasis is on plug and play capabilities. After completing a installation a high number of monitoring plugins will be playing with no more effort. Using Munin you can easily monitor the performance of your computers, networks, SANs, and quite possibly applications as well. It makes it easy to determine “what’s different today” when a performance problem crops up. It makes it easy to see how you’re doing capacity wise on all limited resources. It uses the excellent RRDTool and is written in Perl. Munin has a master/node architecture in which the master connects to all the nodes at regular intervals and asks them for sdata. It then stores the data in RRD files, and (if needed) updates the graphs. One of the main goals has been ease of creating new plugins (graphs).

How-To: Monitoring a Server with Munin

Munin is a simple to configure tool that make real nice graph about your server status. It can actually deal with almost any aspect of your server (load average, network cards status, CPU usage, memory usage, postfix, exim4, mysql ...) without spending much time in configuring it. Munin produce MRTG likes graph so you can easily see how your server health is going.

Munin, une alternative simple à Cacti?

by 1 other
Cela fait près d’un an et demi que j’utilise le logiciel Cacti pour monitorer l’activité réseau. Aussi bien dans le cadre de mon activité professionnelle que pour mon usage personnel. Mais j’ai récement découvert une alternative sérieuse : Munin. Celui-ci présente de nombreux avantages par rapport à Cacti et mérite d’être plus connue.

WebDav Autoversioning

A while back I stumbled upon a lesser known feature of SVN and WebDav, but didn’t have the time to blog about it until now. WebDAV and SVN is an exceedingly useful tool as we all know, and pretty damn easy to setup, see here. But what if you could have everything entered into the WebDav repository automatically versioned into a repository. Well you can! And the good news is, it’s really really easy.

January 2008

Integrating amavisd-new Into Postfix For Spam- And Virus-Scanning

by 1 other
This article shows how to integrate amavisd-new into a Postfix mail server for spam- and virus-scanning. amavisd-new is a high-performance interface between MTAs such as Postfix and content checkers: virus scanners, and/or SpamAssassin. We will use ClamAV for virus scanning and SpamAssassin for spam scanning in this tutorial. I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal but this is the way I take. I do not issue any guarantee that this will work for you!

Postfix Virtual Domain Hosting Howto

This document requires Postfix version 2.0 or later. This document gives an overview of how Postfix can be used for hosting multiple Internet domains, both for final delivery on the machine itself and for the purpose of forwarding to destinations elsewhere. The text not only describes delivery mechanisms that are built into Postfix, but also gives pointers for using non-Postfix mail delivery software.

Creating a Custom RSS Feed with PHP and MySQL

In this article you'll learn how to syndicate your own custom RSS feeds using PHP and MySQL. We'll first learn how to create two database tables and then how to retrieve data from them which will be formatted into an RSS feed. Here's an example of the completed RSS feed and a download link to the code. Let's start by taking a look at how to create the MySQL database tables.

Make SSH connections with PHP

by 3 others
Not everyone knows about PHP's capabilities of making SSH connections and executing remote commands, but it can be very useful. I've been using it a lot in PHP CLI applications that I run from cronjobs, but initially it was a pain to get it to work. The PHP manual on Secure Shell2 Functions is not very practice or thorough for that matter, so I would like to share my knowledge in this how to, to make it a little less time consuming setting this up. In this article I'm going to assume that: * You're running Debian / Ubuntu If not, you will have to substitute the package manager aptitude with whatever your distribution provides * You're running PHP 5 If not, just replace php5 with php4 everywhere * You have basic knowledge of PHP & server administration * You already have PHP installed

December 2007

Sauvegarder ses données avec rsync

C’est simple copie est assez simple à mettre en place, et peut s’avérer très pratique en cas de crash du disque dur. La sauvegarde peut paraitre un peut basique, mais qui à besoin (et qui à assez d’espace disque) pour avoir une sauvegarde jours par jours avec les modifications ?

Convertir système debian en Raid1

Our intention is not to build a fail-safe system nor a HA-Linux. We are just using RAID-1 mirrored disks to make sure that the system can be restored easily if 1 disk crashes. The following has been tested only twice (hey, we've got other things to do). It did work for us, it might work for you. It might also make your rats go berserk or just blow your mind.

Automatic_Bridge_Ubuntu - VirtualBox

This is a quick tutorial on how to setup your Linux environment and VirtualBox, so that it can automatically create network interfaces and put them in bridge when the VM is launched.

Les Conventions en cakePHP

Qui dit conventions dit accords. Une convention n’est pas une règle. Une règle c’est quelque chose d’obligatoire, une convention non. Mais ça peut engendrer des pénalités, dans notre contexte c’est une diminution de la productivité. Cependant la convention peut créer des obligations. C’est-à-dire qu’on dit : voilà cette chose elle est comme ça. Pourquoi ? Ben pourquoi pas ? On bâtit dessus et on avance. Et pourquoi ? Un seul mot, productivité.

UMS firmware for the T10 - Samsung

How to upgrade YP-T10 Firmware - Before upgrade process, please check your battery status. - Connect the player to your computer. - unzip downloaded zip file on your PC - Copy the 2 files into the root directory of the YP-T10. - Select Safely Remove Hardware and remove the YP-T10 from the USB port of the computer. - When you turn the player on, firmware updates are automatically performed during booting. - To confirm an update, Select MENU -> SETTING -> SYSTEM INFO from the menu to view the firmware version

Installation d'un lecteur Samsung YP-U3 sur un système GNU-Linux

Installation d'un lecteur Samsung YP-U3 sur un système GNU-Linux (Ubuntu Gutsy 7.10)

November 2007

SSH Port Forwarding

SSH also has a wonderful feature called SSH Port Forwarding, sometimes called SSH Tunneling, which allows you to establish a secure SSH session and then tunnel arbitrary TCP connections through it. Tunnels can be created at any time, with almost no effort and no programming, which makes them very appealing. In this article we look at SSH Port Forwarding in detail, as it is a very useful but often misunderstood technology. SSH Port Forwarding can be used for secure communications in a myriad of different ways. Let's start with an example.

Pure CSS Scrollable Table with Fixed Header

by 20 others
Pure CSS Scrollable Table with Fixed Header Using CSS to allow scrolling within a single HTML table

SSH-Agent Tutorial

by 1 other
Security is best when it is handy. ssh-agent is pretty darn handy. Ssh-agent can authenticate you to a remote machine via keypairs, rather than the traditional hand-typed username/password combination, with no loss of security.

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