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Turn Your Raspberry Pi into a Network Monitoring Tool. Whether you want to keep an eye on devices on your home network or wish to monitor the performance of your website, the open source Nagios monitoring tool should be your first port of call.

Turn Your Raspberry Pi into a Network Monitoring Tool

Although you’ll need a Linux box, the Nagios software is quick to install and straightforward to configure. But, it’s a bit of a waste of a PC. Having a full system setup and dedicated to checking whether other devices have gone offline wastes space, power and hardware. Fortunately, we have a solution to this, in the shape of the Raspberry Pi, the compact British-built mini-computer that has proved itself to be incredibly versatile since its release in 2012. So popular, in fact, that a new version, the Raspberry Pi 2 has been released in 2015. The Rabbit Hole of Nagios Before we get started, a word of warning.

So before proceeding, keep this in mind. Prepare Your SD Card with NagiosPi With the image written, pop the SD card into your Raspberry Pi and boot it up. Smartlook - Outil gratuit d'enregistrement des écrans des visiteurs et de replay de sessions. Getting Started with Docker for the Node.js Developer. Mettre en place un serveur Web : Apache, Let's Encrypt. Dans ce tutoriel, je vous propose de découvrir comment mettre en place un certificat TLS/SSL en utilisant Let's Encrypt sur un serveur apache.

Mettre en place un serveur Web : Apache, Let's Encrypt

Installation de l'outil En plus d'être une autorité de certificat, Let's Encrypt offre un outil qui permet la mise en place automatique d'un certificat SSL pour votre nom de domaine. Pour installer cet outil, il va falloir commencer par cloner le dépôt GitHub. Nous allons donc commencer par installer git sur notre serveur. A Google Script to Read/Write in a Google Spreadsheet – Blog. I needed to develop an web application capable of read and write in a google spreadsheet.

A Google Script to Read/Write in a Google Spreadsheet – Blog

After few hours turning around my buggy code, I finally find a way to do it. Here is an Demo example of what I did. Query Language Reference (Version 0.7)   The Google Visualization API Query Language lets you perform various data manipulations with the query to the data source.

Query Language Reference (Version 0.7)  

Typically, visualizations expect data in some specific form. For example, a pie chart may expect data as two columns: a text label and a numeric value. The data within the data source may not exactly match this structure. For example the data source may have more than two columns, or the order of the columns may not match the order expected by the pie chart. The query language provides the ability to send data manipulation and formatting requests to the data source, and ensure that the returned data structure and contents match the expected structure.

The syntax of the query language is similar to SQL. Note that data sources are not required to implement the query language, or if they do, to implement all features of the language. Setting the Query from JavaScript. Gulp pour les débutants. Gulp pour les débutants. DataRecovery. Deleted or lost files can sometimes be recovered from failed or formatted drives and partitions, CD-ROMs and memory cards using the free/libre software available in the Ubuntu repositories.


The data is recoverable because the information is not immediately removed from the disk. Follow these steps to recover lost data. You should NOT write to the failed device, as it can worsen a hardware failure, and overwrite existant data in case of lost files . Shut down the affected machine as soon as possible, and restart it from a LiveCD or LiveUSB. Cluster - Private group sharing with friends and family. PingPlotter - Pinpoint Network Problems. How to Monitor User Activity with psacct or acct Tools. Psacct or acct both are open source application for monitoring users activities on the system.

How to Monitor User Activity with psacct or acct Tools

These applications runs in the background and keeps track of each users activity on your system as well as what resources are being consumed. I personally used this program in our company, we have development team where our developers continuously work on servers. So, this is one of best program to keep a eye on them. This program provides an excellent way to monitor what users are doing, what commands are they firing, how much resources are being consumed by them, how long users are active on the system.

Another great feature of this program is it gives total resources consumed by services like Apache, MySQL, FTP,SSH etc. I think this is one of the great and must needed application for every Linux/Unix System Administrators, who wanted to keep a track of user activities on their servers/systems. The psacct or acct package provides several features for monitoring process activities. Niftiest Software. Introduction CUPS Cloud Print is a Google Cloud Print driver for UNIX-like operating systems ( Linux, Mac OS X , BSDs etc ).

Niftiest Software

It allows any application which prints via CUPS to print to Google Cloud Print directly. Why? Flock — Pricing. Gobotree - Design and Architecture Resources. Powershell pour les débutants (1ère partie) I.

Powershell pour les débutants (1ère partie)

Online regex tester and debugger: JavaScript, Python, PHP, and PCRE. Ht01_basic.pdf. Debuter_avec_Base.pdf. 4 étapes pour migrer un serveur web sans interruption. Dans la nuit de mardi à mercredi, j'ai migré une vingtaine de sites web d'un serveur à un autre.

4 étapes pour migrer un serveur web sans interruption

N'ayant pas la main sur les noms de domaine de chacun de ces sites, je ne pouvais pas non plus débrancher en mode sauvage le serveur n°1 et dire aux propriétaires des sites: "Maintenant allez changer vos DNS". Le temps que ça se réplique, que tout le monde le fasse et compagnie, ça peut prendre une semaine complète. Une semaine où leur site aurait été plus ou moins inaccessible pour les internautes. Alors, comment faire dans ce cas là ? Page 2 sur 1808 - Upgrade your mind. On refaisait le monde avec Ploum en fin de semaine dernière, nous remémorant nos débuts sur le net, les premiers sites qu'on lisait et qu'on faisait et bien sûr les blogs FR qu'on aimait lire.

Page 2 sur 1808 - Upgrade your mind

Et je ne sais pas si c'est parce que le monde du blog s'est professionnalisé, si c'est parce que les thématiques ont changé ou si c'est parce qu'on est devenu des vieux cons, mais on n'y trouve plus vraiment notre bonheur en tant que lecteur tendance bidouilleur. Et ça me fait le même effet avec la presse papier informatique. Documents de référence ITIL V3. Cours ITIL : Introduction à ITIL par Philippe Ris. Microsoft Word - itilv3_introduction.docx - itilv3_introduction.pdf.

Using Pidgin with a Google Apps domain. OpenRefine.

Gestion de projet

Solutions collaboratives. Informatique. Authentification sous Linux.