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Microsoft has introduced together with Windows 2008 a new Hypervisor called Hyper-V. Initially Microsoft only supported Microsoft products and Novell Suse, but recently they added support for Red Hat Enterprise Linux. With this support it is also possible to install the components on CentOS.

Sugar is the desktop environment that is used for the "One Laptop per Child" (OLPC) netbooks. It can also be installed on normal computers and even run off of a USB stick (which should have at least 1GB of size). This guide shows how you can install Sugar (the Strawberry release which is based on Fedora 11) on a USB stick.

Drizzle is a Free Software/Open Source database management system (DBMS) that was forked from version 6.0 of the MySQL DBMS. Like MySQL, Drizzle has a client/server architecture and uses SQL as its primary command language. Drizzle is distributed under version 2 of the GNU General Public License.

This tutorial will explain you how to boot from a BTRFS filesystem with kernel 2.6.31-RC4 and BTRFS 0.19. BTRFS is a new filesystem with some really interesting features like online defragmenting and snapshots. BTRFS is an experimental filesystem, use at your own risk. The kernel used is also experimental.

FTP is a very insecure protocol because all passwords and all data are transferred in clear text. By using TLS, the whole communication can be encrypted, thus making FTP much more secure. This article explains how to set up ProFTPd with TLS on a Debian Lenny server.

You'll learn how to recompile PHP5 with bundled support for GD on Ubuntu to use advanced GD functions for image editing, like desaturation, and so on.

LAMP is short for Linux, Apache, MySQL, PHP. This tutorial shows how you can install an Apache2 webserver on an Ubuntu 9.04 server with PHP5 support (mod_php) and MySQL support.

BackerUpper is a tool similar to Apple's TimeMachine. It is intended to create snapshot-backups of selected directories or even your full hard drive. From the BackerUpper project page: "Backerupper is a simple program for backing up selected directories over a local network. Its main intended purpose is backing up a user's personal data." This article shows how to install and use BackerUpper on Ubuntu 9.04 (Jaunty Jackalope).

This tutorial covers the setup of PHP 5.3.0/Lighttpd on Debian (Lenny) with imap, mysql, mysqli, sqlite3, ImageMagick and mycrypt support.

This guide explains how you can run virtual machines with Sun VirtualBox 3.0 (released on June 30, 2009) on a headless Fedora 11 server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.

From time to time, installing VMware Tools on a Linux guest will cause you some grief. While there are lots of howtos, usually they're for VMware Workstation. Here's one that works in Debian/Lenny 5.0.2 on ESX Server 3.5 Update 4.

This tutorial shows how you can install Sun VirtualBox 3.0 (released on June 30, 2009) on a Fedora 11 desktop. With VirtualBox you can create and run guest operating systems ("virtual machines") such as Linux and Windows under a host operating system. There are two ways of installing VirtualBox: from precompiled binaries that are available for some distributions and come under the PUEL license, and from the sources that are released under the GPL. This article will show how to set up VirtualBox 3.0 from the precompiled binaries.

iRedMail is a shell script that lets you quickly deploy a full-featured mail solution in less than 2 minutes. Since iRedMail 0.5, it supports Debian 5.0.1 and Ubuntu 8.04 & Ubuntu 9.04 (both i386 and x86_64). iRedMail supports both OpenLDAP and MySQL as backends for storing virtual domains and users. The OpenLDAP backend of iRedMail allows you to integrate all kinds of applications. This guide shows you how to integrate pure-ftpd into the iRedMail ldap backend on CentOS 5.x, passwords will be stored in ldap and you can change the password through webmail.

This guide explains how you can run virtual machines with Sun VirtualBox 3.0 (released on June 30, 2009) on a headless Ubuntu 9.04 server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.

mod_qos gives some fine-grained opportunities to scale the number of used connections and to defend an attack according to bandwidth limits. Unfortunately it is only available as source-package and there are many possible settings, wich might be hard to set up for this special case. So I provide the way that helped me.

This guide shows how to install and configure Smokeping on Ubuntu 9.04 to monitor network latency. SmokePing is a deluxe latency measurement tool. It can measure, store and display latency, latency distribution and packet loss. SmokePing uses RRDtool to maintain a longterm data-store and to draw pretty graphs, giving up to the minute information on the state of each network connection.

OpenSSH is a great means to protect your connection from being sniffed by others. However, this isn't always enough. Simply proving that you connected to a server is enough to get incriminated. Unfortunately, SSH doesn't provide a native way to obfuscate to whom it connects. Instead, a proxy server can be set up. And this is where TOR comes to play. This howto covers installing TOR on a Debian based system and setting up SSH to use TOR.

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

Nginx (pronounced "engine x") is a free, open-source, high-performance HTTP server. Nginx is known for its stability, rich feature set, simple configuration, and low resource consumption. This tutorial shows how you can install Nginx on an Ubuntu 9.04 server with PHP5 support (through FastCGI) and MySQL support.

This tutorial shows how to do data striping (segmentation of logically sequential data, such as a single file, so that segments can be assigned to multiple physical devices in a round-robin fashion and thus written concurrently) across four single storage servers (running Debian Lenny) with GlusterFS. The client system (Debian Lenny as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86-64 servers with SATA-II RAID and Infiniband HBA.