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Setting Up A High-Availability Load Balancer (With Failover and Session Support) With HAProxy/Heartbeat On Debian Etch

  • HowtoForge; By Falko Timme (Posted by falko on Nov 7, 2007 6:56 PM EDT)
  • Story Type: Tutorial; Groups: Debian
This article explains how to set up a two-node load balancer in an active/passive configuration with HAProxy and heartbeat on Debian Etch. The load balancer sits between the user and two (or more) backend Apache web servers that hold the same content. Not only does the load balancer distribute the requests to the two backend Apache servers, it also checks the health of the backend servers. If one of them is down, all requests will automatically be redirected to the remaining backend server. In addition to that, the two load balancer nodes monitor each other using heartbeat, and if the master fails, the slave becomes the master, which means the users will not notice any disruption of the service. HAProxy is session-aware, which means you can use it with any web application that makes use of sessions (such as forums, shopping carts, etc.).

Synaq scores Linux hole-in-one

South African Linux and open source specialist Synaq has been contracted to manage and maintain the Linux-based network infrastructure for The Pro Shop, a national supplier of golfing product and services. The Pro Shop is one of several divisions of MoreGolf. Each division of MoreGolf runs off a Linux-based infrastructure and connects with head office in Woodmead through ADSL VPN. There are ten sites that form part of this VPN and each site runs a Linux firewall.

Why Gphone Will Use Ubuntu

  •; By Matt Hartley (Posted by gsh on Nov 7, 2007 5:21 PM EDT)
  • Story Type: Editorial; Groups: Linux
By now all of you have likely heard of the Google concept call the 'Gphone.' Yet there remains a lot of speculation in regards to its future.

Everex plans sub-$300 Linux notebook for 2008

Read all the way to the bottom of this iTWire article about low-cost pre-loaded Linux systems -- the Asus and Everex -- and you'll learn, as I did, that Everex is planning a pre-loaded Linux laptop.

OLPC makes its entry into India

When the OLPC first made news, a prominent official in the HRD ministry of the Indian government had gone on record snubbing the OLPC project ($100 laptop), even making a preposterous claim that work was under way to create India's own $10 laptop. But as things have worked out, OLPC has already made an entry into India in the form of a pilot project in a rural primary school in a village in the state of Maharasthra.

New release of internet cafe software

Want to start an internet cafe but not willing to fork out handfuls of cash to get going? We've written about OutKafe before and now a new version of the cafe management suite has been released.

Hugin: Software To Create Panoramic Photograph in Ubuntu Linux

I’ve always wanted to try and take panoramic photographs using my dad’s Nikon Coolpix 5200. That day finally arrived when I finally have the free time to do so last week when I’ve to accompany my dad traveling to the countryside of my hometown. I was excited and about to use a Windows computer to stitch those photograph using software supplied with the camera when suddenly I thought of searching for a panorama maker software on my trusty Ubuntu box. To my delight I found Hugin! An open source panorama maker software which I use without hesitation to create a my first ever panoramic photos.

Be heard: Podcasting with Linux

Many people are giving up blogging to try their hand at podcasting -- creating a downloadable audio file that will play on any standard MP3 player. Recording, editing, and packaging a session isn't very difficult but, until recently not very many tools existed to help you get the job done. Now Linux-friendly applications are starting to pop up everywhere. The basic tools you'll need haven't changed much since podcasting began. At the very least, you'll need a good microphone and headset, and a sound card equipped with a line-in port. There are several high-end hardware products on the market, but for general podcasting needs, some basic equipment paired with good editing software will meet most people's needs.

Surfing the Web On a PC Without An OS

  •; By Matt Hartley (Posted by gsh on Nov 7, 2007 12:50 PM EDT)
  • Story Type: Editorial; Groups: Community
Every once in a while, something new comes along that is both a bit confusing and amazingly cool all at the same time. Upon discovering the new product aptly called Splashtop, DeviceVM allows a user to browse the Web, talk on Skype, and access other PC functions without the need to boot into your computer's OS.

Rack-Soft Launches the Free 4PSA VoipNow Express Edition PBX Software

  •; By Elena Tasu (Posted by elen on Nov 7, 2007 12:03 PM EDT)
  • Story Type: Press Release
Rack-Soft announced the availability of the free 4PSA VoipNow Express PBX software with advanced PBX features.

GigE AMC cards target Carrier Grade Linux apps

GE Fanuc has introduced two versions of a Gigabit Ethernet card in the AMC (advanced mezzanine card) form-factor. The Telum GE-QLX and GE-QSX deliver up to four Gigabit Ethernet ports and offer fiber optic transceivers, and support Carrier Grade Linux, according to the company. Designed for AdvancedTCA or MicroTCA platforms, such as GE Fanuc's MP-2000 and MP-3000 MicroTCA platforms, the Telum-series AMC boards are said to boost performance via TCP CRC checksum calculations and segmentation offloading.

Linux Media Player Roundup - Part 2

  • Raiden's Realm; By Steve Lake (Posted by SamShazaam on Nov 7, 2007 10:28 AM EDT)
  • Story Type: Reviews; Groups: Linux
Welcome to part 2 of our Linux Media Player Roundup. Today we'll be covering a few more Linux Media Players and showing you each of them, and what makes them special.

FOSS for cartoonists and illustrators

As more and more traditional publishers accept digital images, artists are turning to free and open source software (FOSS) tools to create cartoons and illustrations.

New Cray supercomputer based on Linux

Struggling to monitor global weather patterns or stars in the galaxy on your home machine? Perhaps the Cray XT5, the world's most scalable Linux-based supercomputer, is what you need? Well, probably not, but its fun to dream.

BBC admits massive underestimate of Linux users

The BBC has backtracked on claims that it has only hundreds of Linux users accessing its website. Last month, the BBC's director of BBC Future Media and Technology, Ashley Highfield, told a magazine that just 400-600 Linux users visited the BBC sites every week. Now, Highfield claims on his blog that the figure could be as high as 97,600.

Keeping Command History across Multiple Sessions

The bash shell maintains a history of the commands you entered. You can re-execute a command by recalling it from the history, without having to re-type it. Life is simple if we operate on a single shell session at any given time. If you have 2 simultaneous sessions, you may be surprised that the history does not have the commands you expect.

HTC to make first Android handset

Best known for enterprise-focused Windows Mobile handsets, HTC's phone using Google's Linux-based platform will extend its consumer portfolio.

Fixing Miro On Ubuntu

  • Lockergnome's Linux Fanatics; By Matt Hartley (Posted by extradudeguy on Nov 7, 2007 5:47 AM EDT)
  • Story Type: Tutorial; Groups: Ubuntu
I know that this latest Miro release has been pretty odd, being that it does not play well with sun-java6-plugin or sun-java5-plugin for some strange reason.

Automated License Systems Deploys Levanta’s Intrepid X

Nation’s leading provider of recreational wildlife licenses utilizes Levanta’s solution to keep their Linux data centers running smoothly

SSH Port Forwarding

SSH (Secure SHell) is well known to Linux administrators as the de facto method for connecting to other systems. SSH long ago supplanted other connection methods because it strongly encrypts the connection between the hosts, ensuring that passwords and any transmitted data are safe from prying eyes. On Fedora® and Red Hat® Enterprise Linux® systems, and many other Linux distributions, the OpenSSH suite provides the programs for this purpose. An administrator typically runs SSH to login to another system, often to run a shell on the remote host and issue commands. SSH, however, has many extra tricks up its sleeve beyond simply securing a connection.

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