This document describes how to add WiKID two-factor authentication to Apache 2.2.22 using mod_auth_radius on Ubuntu 12.04. It is also recommended that you consider using mutual https authentication for web applications that are worthy of two-factor authentication. Strong mutual authentication means that the targeted website is authenticated to the user in some cryptographically secure manner, thwarting most man-in-the-middle attacks. The use of cryptography is key. While some sites use an image in an attempt to validate a server, it should be noted that any man-in-the-middle could simply replay such an image.

Backups are usually made in one of two ways - either file-based which means that single files are backed up, often via synchronization and on an external disk, or image-based which means that a whole partition is stuffed into an image file that can be restored on the partition, containing everything there was on it. This tutorial covers image-based backups using Partimage from a live desktop environment.

http://www.howtoforge.com/create-and-restore-partition-images-with-partimage

(R)?ex is a server orchestration and configuration management tool. With (R)?ex you can manage all your boxes from a central point through the complete process of configuration management and software deployment. In this guide I will show you with the help of a project how to use (R)?ex to configure your servers and how to deploy software.

http://www.howtoforge.com/how-to-manage-your-servers-with-rex-best-practice

This tutorial shows how you can install and run OXID eShop Community Edition (version 4.5.9) on a Debian Squeeze or Ubuntu 11.10 system that has nginx installed instead of Apache (LEMP = Linux + nginx (pronounced "engine x") + MySQL + PHP). OXID eShop is a feature-rich ecommerce platform; I will use the Community Edition here which is licensed under an open source certified license (GPL v3.. nginx is a HTTP server that uses much less resources than Apache and delivers pages a lot of faster, especially static files.

This tutorial shows how to set up a standalone storage server on Debian Squeeze. Instead of NFS, I will use GlusterFS here. The client system 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.