Nginx+PHP(FPM)+MySQL+Memcache+eAccelerator on Debian6 | Qi Yang – I recently rebuild my linux image on Linode, so I have to reinstall the LEMP stack again from ground. Last time was probably more than a year ago, with the help of many tutorials from google. So this time I decide to write what I did step by step for my reference in the future [...]
Magento caching, APC, eAccelerator Memcached, files, sqlite, Vanish, what’s the … happen? | Alex Paradise – Magento is slow! It’s how start most of the article about Magento cache optimization. Yes, Magento is slow and this because of the way the code is written, extreme object oriented. Stackoverflow say “It is written in an Enterprise Java idiom” and there are right. Anyway, we can’t change anything about it and in one side that let us lot of flexibility. So, Magento IS SLOW! And what’s can we do? There is many thing to do, many, many. But the most important one is to work around the cache. I am searching for a cache solution and found so much different stuff like APC, eAccelerator, memcached, tmpfs, varnich, lighthttpd, nginx and so on… I will try to explain the different possibilities if found while my research and finished by the one I will implement[...]
Do you have any tips for making WorldClient run faster?
MySQL-Galera cluster with HAproxy – Sébastien han – When I started working on Open Stack, I had to investigate about the HA of the nova component. Unfortunatly the nova configuration needed a single entry point to connect to the MySQL database. The solution that came to me was to use HAProxy on top of my existing Galera cluster…
SEC – open source and platform independent event correlation tool – SEC is a tool for accomplishing event correlation tasks in the domains of log analysis, system monitoring, network and security management, etc. Event correlation is a procedure where a stream of events is processed, in order to detect (and act on) certain event groups that occur within predefined time windows. Unlike most other event correlation products which are heavyweight solutions, SEC is a lightweight and platform-independent event correlator which runs as a single process.
These are my links for 22 mag 2012 through 25 mag 2012:
Debian Clusters – This site is a series of step-by-step tutorials for anyone interested in building a Debian cluster. It is geared particularly towards those interested in a Debian cluster for education or research purposes. This site is being written alongside the construction of a real Debian cluster at my institute, starting from the ground (basic networking, DHCP, DNS, authentication) up through installation a queue/scheduler and scientific software.
However, these tutorials and guides take some assumptions about users for granted, including basic Linux and Debian knowledge (see the Basic Linux Skills page for clarification and pointers to resources). This is not meant as an introduction to Debian or on how to cluster in general – thankfully, there are plenty of helpful tutorials and guides already in existence on those topics. A basic understanding of Debian and cluster technology will aid in following the tutorials.
About Acme Systems srl – Acme Systems srl is a company specialising in the development of projects, production and assemblage of low-cost microprocessor boards, developed for rapid prototyping in civil and industrial environments.
Acme Systems products are designed to be used with Open Source softwares like Linux, GNU C/C++, Python, Java, etc which are available already configured for free downloading from our site and which are immediately operative on our hardware.
All the Acme Systems products are fully assembled in-site in our headquarter located in Ladispoli a small town 20 km far from Rome, Italy
SSH: What and How | Nettuts+ – Many web developers use SSH (“Secure Shell”) on a daily basis to manage their servers, back up files, work remotely, and a myriad of other tasks. Today, I’ll explain what SSH is, do a brief history review, and, lastly, teach you how to set it up on your remote server or even your local network. Let’s get started!
Using static passwords for authentication, as it is commonly done, has quite a few security drawbacks: passwords can be guessed, forgotten, written down and stolen, eavesdropped or deliberately being told to other people. A better, more secure way of authentication is the so called "two-factor" or "strong authentication" based on one time passwords. Instead of authenticating with a simple password, each user carries a device ("token") to generate passwords that are valid only one time.
client for: Standard phone and BlackBerry (J2ME) iPhone Google Android Windows Phone 7 PalmOS webOS Maemo Openmoko Universal Web App Windows Linux MacOS
Server-Side: Mobile-OTP Authentication Server (MOTP-AS) Full blown RADIUS server specifically for Mobile-OTP. include: - authenticating users by RADIUS (and optionally PAM or Apache) - SQL database for user/device configuration - Administration Web Interface
Open Monitoring Distribution – Wiki – OMD – Welcome to OMD – the Open Monitoring Distribution. OMD implements a completely new concept of how to install, maintain and update a monitoring system built on Nagios.
OMD avoids the tedious work of manually compiling and integrating Nagios addons while at the same time avoiding the problems of pre-packaged installations coming with your Linux distribution, which are most times outdated and provide no regular updates.
OMD bundles Nagios together with many important addons and can easily be installed on every major Linux distribution. We provide prebuilt packages for all enterprise Linux distributions and also for some other, such as Ubuntu 11.04.