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Unix+clones

Configuring Apache for Maximum Performance

Post date: February 12, 2006, 09:02 Category: Optimizing Views: 3867 Comments
Tutorial quote: Apache is an open-source HTTP server implementation. It is the most popular web server on the Internet; the December 2005 Web Server Survey conducted by Netcraft [1] shows that about 70% of the web sites on Internet are using Apache.

Apache server performance can be improved by adding additional hardware resources such as RAM, faster CPU, etc. But most of the time, the same result can be achieved by custom configuration of the server. This article looks into getting maximum performance out of Apache with the existing hardware resources, specifically on Linux systems. Of course, it is assumed that there is enough hardware resources - especially enough RAM that the server isn't swapping frequently. First two sections look into various Compile-Time and Run-Time configuration options. The Run-Time section assumes that Apache is compiled with prefork MPM. HTTP compression and caching is discussed next. Finally, using separate servers for serving static and dynamic contents is covered. Basic knowledge of compiling and configuring Apache and Linux are assumed.
Unix+clones

Backing up your files with rsync

Post date: October 14, 2007, 15:10 Category: Network Views: 3697 Comments
Tutorial quote: Backing up files on a regular basis is an integral part of administering your server.

One way is to download each and every file when you want to save them. However, rsync makes the task a lot easier as it only downloads files that have changed - saving time and bandwidth.
FreeBSD

Creating A DNS Cache With djbdns

Post date: May 5, 2007, 22:05 Category: Installing Views: 3775 Comments
Tutorial quote: Building a local DNS cache will speed up your internet connection since the time for the translation job (converting domain names into IP addresses) will become negligible with the assumption that the DNS cache gets the information from the parent DNS.
Ubuntu

Installing Oracle VM VirtualBox on Ubuntu

Post date: October 10, 2010, 05:10 Category: Software Views: 4035 Comments
Tutorial quote: What does that mean? For one thing, VirtualBox installs on your existing Intel or AMD-based computers, whether they are running Windows, Mac, Linux or Solaris operating systems. Secondly, VirtualBox extends the capabilities of your existing computer so that VirtualBox can run multiple operating systems (inside multiple virtual machines) at the same time. So, for example, you can run Windows and Linux on your Mac, run Windows Server 2008 on your Linux server, run Linux on your Windows PC, and so on, all alongside your existing applications. You can install and run as many virtual machines as you like -- the only practical limits are disk space and memory.
Debian

Installing And Working With eyeOS Under Debian 4.0

Post date: June 11, 2007, 20:06 Category: Software Views: 3399 Comments
Tutorial quote: This tutorial shows how you can install eyeOS on a standard Linux system. EyeOS is a kind of operating system which works online, i.e. it manages files on the server and enables the user to upload, download and edit files.
Debian

Secure Your Apache With mod_security

Post date: July 16, 2006, 16:07 Category: Security Views: 4996 Comments
Tutorial quote: This article shows how to install and configure mod_security. mod_security is an Apache module (for Apache 1 and 2) that provides intrusion detection and prevention for web applications. It aims at shielding web applications from known and unknown attacks, such as SQL injection attacks, cross-site scripting, path traversal attacks, etc.

In the first chapter I will show how to install mod_security on Debian Sarge, Ubuntu 6.06 LTS (Dapper Drake), and on Fedora Core 5, and in the second chapter I will describe how to configure Apache for mod_security which is independent from the distribution you're using.

I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal but this is the way I take. I do not issue any guarantee that this will work for you!
Linux

Inkscape: Vector Graphics For Linux

Post date: April 13, 2005, 02:04 Category: Multimedia Views: 2883 Comments
Tutorial quote: In this story we'll do a quick primer on how you can get up to speed on Inkscape. Along the way, we'll explore situations where a vector based graphic would be better suited for a job than a raster based picture. In spite of not being an XML or web development expert I think SVG will be important in the future. Read on and you'll see why.
Linux

How to set up a mail server on a GNU / Linux system

Post date: February 7, 2006, 07:02 Category: Network Views: 5261 Comments
Tutorial quote: Easy to follow howto on setting up a mail server with unlimited users and domains, with IMAP/Pop access, anti-spam, anti-virus, secure authentication, encrypted traffic, web mail interface and more.

Based on an Ubuntu distribution platform, but instructions are distro generic.
Debian

How To Set Up A Loadbalanced High-Availability Apache Cluster

Post date: April 28, 2006, 06:04 Category: Network Views: 4051 Comments
Tutorial quote: This tutorial shows how to set up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another "Single Point Of Failure", we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently.
Ubuntu

How To Set Up A Loadbalanced High-Availability Apache Cluster On Ubuntu 8.04 LTS

Post date: June 12, 2008, 11:06 Category: Installing Views: 3237 Comments
Tutorial quote: This tutorial shows how to set up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another "Single Point Of Failure", we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently.
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