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Debian

How to set up VoIP calls in your Cybercafé with Xorcom Rapid, Asterisk PBX and *starShop-OSS

Post date: September 18, 2006, 14:09 Category: Software Views: 4328 Comments
Tutorial quote: In this howto i will guide you step-by-step on how to successfully setup long distance calls service in your Cybercafé, using open source software. The main element is *starShop-OSS, an open source application designed to monitor and bill, in real time, calls made via Asterisk PBX. This service is commonly called : callshop or taxiphone.
FreeBSD

Setting up a Secure Subversion Server

Post date: May 17, 2005, 08:05 Category: Network Views: 6272 Comments
Tutorial quote: This article demonstrates how to create a secure repository using Subversion. The next installment will show how to train your users to access the repository using a GUI client.
Debian

How to set up an encrypted filesystem in several easy steps

Post date: December 10, 2006, 08:12 Category: Security Views: 4000 Comments
Tutorial quote: There's been a lot of talk lately about encrypted partitions, and Debian is proud to offer a feature to easily create them in the etch installer since beta3. But what about existing systems? This guide walks you through setting up an encrypted partition using cryptsetup and LUKS.
OpenSUSE

HowTo: Install configure KVM Virtualization & run Guest OSes in openSUSE

Post date: September 30, 2008, 21:09 Category: Emulation Views: 6891 Comments
Tutorial quote: Kernel-based Virtual Machine (KVM) is a Linux kernel virtualization infrastructure. KVM is a full virtualization solution for Linux on x86 hardware containing virtualization extensions Intel VT (vmx) or AMD-V (svm). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. KVM also requires a modified QEMU although work is underway to get the required changes upstream.
Ubuntu

Load-Balanced High-Availability Web Cluster With 2 Xen Servers On Ubuntu 8.04

Post date: October 12, 2008, 12:10 Category: Installing Views: 3490 Comments
Tutorial quote: In this howto we will build a load-balanced and high-availability web cluster on 2 real servers with Xen, hearbeat and ldirectord. The cluster will do http, mail, DNS, MySQL database and will be completely monitored. This is currently used on a production server with a couple of websites. The goal of this tutorial is to achieve load balancing & high availability with as few real servers as possible and of course, with open-source software. More servers means more hardware & hosting cost.
Linux

Xen Virtualization and Linux Clustering, Part 2

Post date: January 21, 2006, 06:01 Category: System Views: 3543 Comments
Tutorial quote: We ended last time after configuring our first unprivileged Xen domain. In this article, we complete our cluster and then test it using an open-source parallel ray tracer. The first thing we need to do is create additional slave nodes to be used with the cluster. So, let's get down to business.
Linux

Entering A Safe Mirror When Logging In With Unionfs And Chroot

Post date: June 28, 2007, 00:06 Category: Miscellaneous Views: 3179 Comments
Tutorial quote: When reading a hint on the website of LinuxFromScratch I discovered the special capabilities of unionfs, specially in combination with chroot. Later I read a HowTo on a wikiwebsite of Gentoo, about entering a chrooted home directory when using a special script as shell. Combining these two brings me to using a chrooted environment, which you enter when logging in as a special user. This environment is an exact copy (mirror) of the system you are working on. Because you are in safe copy of the real system, you can do whatever you like, it will never change the system, everything stays inside the cache (the readwrite branch).
Linux

Install Java JRE 1.6.0 (Update x) in Linux as the Default Java Runtime, including Firefox Browser Plugin

Post date: March 29, 2009, 05:03 Category: Installing Views: 7301 Comments
Tutorial quote: HowTo for installing the latest version of Sun's Java JRE on 32 and 64 bit Linux systems, and set it to run as the default JRE for all Java applications. The tutorial also includes installing the Java JRE Firefox Browser plugin. The tutorial is regularly updated to reflect the latest version of JRE.
Linux

NPTL vs. NPGT vs. LinuxThreads

Post date: April 24, 2005, 09:04 Category: Benchmarks Views: 3599 Comments
Tutorial quote: Ulrich Drepper recently offered some interesting benchmark results, comparing the time it takes to create and destroy threads with different threading models under various conditions. The tests were run using a 2.5.37 development kernel, comparing LinuxThreads, NGPT 2.0.2 and NPTL 0.1.
Debian

How To Set Up A Load-Balanced MySQL Cluster

Post date: March 31, 2006, 19:03 Category: Software Views: 4361 Comments
Tutorial quote: This tutorial shows how to configure a MySQL 5 cluster with three nodes: two storage nodes and one management node. This cluster is load-balanced by a high-availability load balancer that in fact has two nodes that use the Ultra Monkey package which provides heartbeat (for checking if the other node is still alive) and ldirectord (to split up the requests to the nodes of the MySQL cluster).

In this document I use Debian Sarge for all nodes. Therefore the setup might differ a bit for other distributions. The MySQL version I use in this setup is 5.0.19. If you do not want to use MySQL 5, you can use MySQL 4.1 as well, although I haven't tested it.

This howto is meant as a practical guide; it does not cover the theoretical backgrounds. They are treated in a lot of other documents in the web.
Web-based applications and online marketing solutions - LumoLink