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Configuring A High Availability Cluster (Heartbeat) On CentOS

Configuring A High Availability Cluster (Heartbeat) On CentOS

This guide shows how you can set up a two node, high-availability HTTP cluster with heartbeat on CentOS. Both nodes use the Apache web server to serve the same content.

Full Mail Server Solution w/ Virtual Domains & Users (Debian Etch, Postfix, Mysql, Dovecot, DSpam, ClamAV, Postgrey, RBL)

Full Mail Server Solution w/ Virtual Domains & Users (Debian Etch, Postfix, MySQL, DoveCot, DSpam, ClamAV, Postgrey, RBL)

This guide describes how to set up a full email solution in Debian Linux (all code is from Debian Etch).  I was asked to design a secure, scalable, portable solution for a small company.  While the guide references many 'servers', the company only had 4 physical machines, Xen was used to virtualize the entire solution.  That particular aspect of the system is not discussed in this guide, although I will try to get it into the next revision.

Merging Multiple Apache Access Logs Into One Overall Access Log

Merging Multiple Apache Access Logs Into One Overall Access Log

Let's assume you have a web application that runs of a cluster of Apache nodes. Each node generates its own Apache access log from which you can generate page view statistics with tools such as Webalizer or AWStats. Obviously you do not want to have page view statistics for each Apache node, but overall page view statistics. To achieve this, we must merge the access logs from each node into one overall access log that we can then feed into Webalizer or AWstats. There is a Perl script called logresolvemerge.pl (part of the AWStats package) that can do this for us.

Make Your Linux Desktop Look Like A Mac - Mac4Lin Project Documentation

Make Your Linux Desktop Look Like A Mac - Mac4Lin Project Documentation

Do you want to give your desktop a dash of Mac OS X? The goal of this project is to bring the look and feel of Mac OS X (latest being 10.5, Leopard) on *nix GTK based systems. This document will present the procedure to install Mac4Lin pack & tweak certain things to get that almost perfect Mac OS X like desktop.

Ubuntu 7.04 and Compiz Fusion on an Acer 3680 Laptop - A Review

Ubuntu 7.04 and Compiz Fusion on an Acer 3680 Laptop - A Review

1.5 GB RAM, 80 GB Hard Drive, Intel Corp. Mobile 945GM/GMS/940GML Express Video Card. Dual boots with Ubuntu and Windows Vista. Ubuntu detected all the hardware but the Atheros AR5BXB63 wireless card. Installing the Windows driver with NDIS Wrapper didn't seem to work, ...

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

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

This article explains how to set up a two-node load balancer in an active/passive configuration with HAProxy and keepalived 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 keepalived, 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.).

The Perfect Desktop - Linux Mint 3.1 "Celena" FE

The Perfect Desktop - Linux Mint 3.1 "Celena" FE

This document describes how to set up a Linux Mint 3.1 "full edition" desktop. The result is a fast, secure and extendable system that provides all you need for daily work and entertainment. Linux Mint 3.1 builds upon Ubuntu Feisty and is compatible to its repositories - about 22.000 packages are available.

How To Compile rTorrent From SVN In Ubuntu Gutsy Gibbon

How To Compile rTorrent From SVN In Ubuntu Gutsy Gibbon

Torrent is a great way to transfer large files very quickly. However most torrent clients are gui based and have quite some impact on system resources (e.g. Azureus). rTorrent is a lightweight client running from the terminal. Being able to run it in a screen session (also upon boot) makes it ideal to also control it from a remote location.

Using The Avant Window Navigator (AWN) On Fedora 7

Using The Avant Window Navigator (AWN) On Fedora 7

This document describes how to set up the Avant Window Navigator (AWN) on Fedora 7. The result is an eye candy, dock-like bar at the bottom of the screen as a replacement for the standard gnome-panel. The Avant Window Manager provides an easy to use interface where you can configure/customize it to your needs. Launchers, task lists, and third party applets are supported.

Installing ehcp (Easy Hosting Control Panel) On Any Debian Or Apt-Get Based Distro, Including Ubuntu

Installing ehcp (Easy Hosting Control Panel) On Any Debian Or Apt-Get Based Distro, Including Ubuntu

In this tutorial I will show you howto install ehcp on any debian based distro, or any distro that has apt-get support. ehcp stands for Easy Hosting Control Panel. It may be used by anyone wanting to host multiple domains in his dedicated/vps server. It is a hosting control panel under development.

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