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Debian

High-Availability Load Balancer With HAProxy/Keepalived On Debian Lenny

Post date: June 16, 2009, 10:06 Category: Installing Views: 5357 Comments
Tutorial quote: This article explains how to set up a two-node load balancer in an active/passive configuration with HAProxy and keepalived on Debian Lenny. 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.).
Debian

The Perfect Xen 3.0 Setup For Debian

Post date: April 1, 2006, 05:04 Category: System Views: 3292 Comments
Tutorial quote: This tutorial provides step-by-step instructions on how to install Xen (version 3.0.1) on a Debian Sarge (3.1) system.

Xen lets you create guest operating systems (*nix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host operating system (dom0). Using Xen you can separate your applications into different virtual machines that are totally independent from each other (e.g. a virtual machine for a mail server, a virtual machine for a high-traffic web site, another virtual machine that serves your customers' web sites, a virtual machine for DNS, etc.), but still use the same hardware. This saves money, and what is even more important, it's more secure. If the virtual machine of your DNS server gets hacked, it has no effect on your other virtual machines. Plus, you can move virtual machines from one Xen server to the next one.
Debian

Virtualization With Xen On Debian Lenny (AMD64)

Post date: February 8, 2009, 13:02 Category: Installing Views: 3900 Comments
Tutorial quote: This tutorial provides step-by-step instructions on how to install Xen on a Debian Lenny (5.0) system (AMD64). Xen lets you create guest operating systems (*nix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host operating system (dom0). Using Xen you can separate your applications into different virtual machines that are totally independent from each other (e.g. a virtual machine for a mail server, a virtual machine for a high-traffic web site, another virtual machine that serves your customers' web sites, a virtual machine for DNS, etc.), but still use the same hardware. This saves money, and what is even more important, it's more secure. If the virtual machine of your DNS server gets hacked, it has no effect on your other virtual machines. Plus, you can move virtual machines from one Xen server to the next one.
Debian

Paravirtualization With Xen 4.0 On Debian Squeeze (AMD64)

Post date: March 31, 2011, 09:03 Category: Installing Views: 3657 Comments
Tutorial quote: This tutorial provides step-by-step instructions on how to install Xen 4.0 on a Debian Squeeze (6.0) system (AMD64) and create paravirtualized guests. Xen lets you create guest operating systems (*nix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host operating system (dom0). Using Xen you can separate your applications into different virtual machines that are totally independent from each other (e.g. a virtual machine for a mail server, a virtual machine for a high-traffic web site, another virtual machine that serves your customers' web sites, a virtual machine for DNS, etc.), but still use the same hardware. This saves money, and what is even more important, it's more secure. If the virtual machine of your DNS server gets hacked, it has no effect on your other virtual machines. Plus, you can move virtual machines from one Xen server to the next one.
Debian

How To Speed Up Drupal 7.7 With Boost And nginx (Debian Squeeze)

Post date: August 21, 2011, 18:08 Category: Miscellaneous Views: 2872 Comments
Tutorial quote: This tutorial shows how you can speed up your Drupal 7.7 installation on a LAMP stack (Debian Squeeze) with the help of Boost and nginx. Boost provides static page caching for Drupal enabling a very significant performance and scalability boost for sites that receive mostly anonymous traffic. Boost makes sure that your logged-in users always get fresh content by not caching pages for logged-in users. In a first step I will show how to make your site faster by enabling Boost on a normal LAMP stack (Apache2, PHP, MySQL), and in a second step I explain how to make your site even faster by using nginx as a reverse proxy sitting in front of Apache and delivering the static HTML pages cached by Boost. nginx delivers static files a lot of faster than Apache and uses less memory/CPU.
Ubuntu

Automatix2 Overview Guide in Ubuntu Feisty Fawn With lots of Screenshots

Post date: April 14, 2007, 04:04 Category: Desktop Views: 3401 Comments
Tutorial quote: Automatix is a graphical interface for automating the installation of the most commonly requested applications in Debian based Linux operating systems.
Debian

Howto install pureftpd on a debian machine

Post date: April 10, 2006, 02:04 Category: Software Views: 3493 Comments
Tutorial quote: The target of this tutorial is to have a successful installation of the ftp-daemon pureftpd working with virtual user accounts. You should already know about installing pureftpd.
Debian

Bind chroot howto

Post date: April 12, 2005, 17:04 Category: Security Views: 3199 Comments
Tutorial quote: This document describes how to install the DNS server Bind on Debian so that it runs out of a chroot jail for security reasons.
Linux

Building an LDAP Server on Linux, Part 2

Post date: April 15, 2005, 17:04 Category: Network Views: 4189 Comments
Tutorial quote: Welcome back! In Part 1 we learned basic concepts of LDAP and the uses for an LDAP server. Today we'll install and configure an OpenLDAP directory.

A quick note before we get started: this is LDAP 101. We are not installing any kind of encryption or strong authentication; we'll get to that in part 3. In my experience, learning LDAP in small chunks works best. (Then again, perhaps I'm just a bit dim.) So sit back, strap in, and keep your fingers away from the training wheels.

"The wise sysadmin will consult the documentation for their distro; it's quite possible that OpenLDAP will be packaged and ready to go in a pleasing manner (or ready to go in an odd manner--you never know). I'm all for easy--if your particular distribution provides an easy way, use it. RPMs can also be obtained from rpmfind.net, which thoughtfully lists all the required additional packages.

"Debian of course goes its own merry way. apt-get does the job just fine; the tricky bit is finding out the package names. Debian users want ldap-utils; slapd, which is OpenLDAP; and libdb4.1, to get the Sleepycat DB. These three components are enough to get you up and running. apt-get will walk you through a minimal configuration and will automatically start up slapd, the LDAP server daemon.
Debian

Packaging Tutorial for Xandros 3.0

Post date: April 12, 2005, 17:04 Category: Miscellaneous Views: 2846 Comments
Tutorial quote: In this document I will walk you through the process of creating a Debian package for Xandros 3.0. When completed this package will install the Kasablanca FTP client.
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