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This tutorial shows how you can enable Compiz Fusion on an OpenSUSE 11.4 GNOME desktop (the system must have a 3D-capable graphics card - I'm using an NVIDIA GeForce 8100 here). With Compiz Fusion you can use beautiful 3D effects like wobbly windows or a desktop cube on your desktop.

So, you got yourself a nice OpenVPN box. People need to login with their certificates but... if their laptop is stolen anyone could login. Sure, you could add password login but that's a bit outdated. The solution for this is using an OTP (one time password).

Lighttpd is a secure, fast, standards-compliant web server designed for speed-critical environments. This tutorial shows how you can install Lighttpd on a CentOS 5.6 server with PHP5 support (through FastCGI) and MySQL support.

This tutorial explains the installation of a Samba fileserver on CentOS 5.6 and how to configure it to share files over the SMB protocol as well as how to add users. Samba is configured as a standalone server, not as a domain controller. In the resulting setup, every user has his own home directory accessible via the SMB protocol and all users have a shared directory with read-/write access.

This article shows how you can change the appearance of your Ubuntu 11.04 desktop (with the Ubuntu Classic interface, i.e., GNOME instead of Unity) so that it resembles a Mac. This can be achieved with the help of Elementary, Docky, and Gloobus-Preview. Elementary is a project that provides a popular icon set and GTK theme; Docky is an interactive dock (like the one you know from a Mac) that provides easy access to some of the files, folders, and applications on your computer, and more; and Gloobus-Preview is an extension for the Gnome Desktop Environment designed to enable a full screen preview of any kind of file or directory.

While it is great that more services such as Facebook and Google are offering two-factor authentication, there are still plenty of services that do not. What is the next best thing? Using a password manager and incredibly complex passwords. A password manager allows you to use different passwords at all the sites and services you visit, but it creates a 'keys-to-the-kingdom' problem. This tutorial will show you how to install the WebKeePass open-source web-based, enterprise password manager and how to protect it with two-factor authentication from WiKID Systems. Note that we have not evaluated the security of WebKeePass - this would certainly be worthwhile. Our primary selection criteria were: open-source, multi-user and allowed for external authentication, in this case via LDAP. Another option that looked promising was CorporateVault.

This tutorial shows how you can enable Compiz Fusion on an Ubuntu 11.04 (Natty Narwhal) desktop with the classic GNOME interface, i.e., no Unity (the system must have a 3D-capable graphics card - I'm using an NVIDIA GeForce 8200 here). With Compiz Fusion you can use beautiful 3D effects like wobbly windows or a desktop cube on your desktop.

With the current economic conditions, companies have been trying to do more with less by recycling old hardware and utilizing open source software. That's also true where I work. Between our call center, finance, distribution, warehouse, and sales departments over 50% of the company's employees are running on RHEL4 LTSP thin clients. Recently it was decided to update our LTSP environment from RHEL4 to Ubuntu 10.04 with LTSPv5. Using the following steps, I was able to set up and integrate an Ubuntu 10.04 LTSPv5 server into a Windows 2008 Active Directory domain.

In this HowTo I will describe how to prepare a Fedora 15 server for OpenVZ. With OpenVZ you can create multiple Virtual Private Servers (VPS) on the same hardware, similar to Xen and the Linux Vserver project. OpenVZ is the open-source branch of Virtuozzo, a commercial virtualization solution used by many providers that offer virtual servers. The OpenVZ kernel patch is licensed under the GPL license, and the user-level tools are under the QPL license.

In this current changing world of unified communication, organizations and support teams require some form of communication to improve efficiency and possibly customer satisfaction. In this document, we will look at how to set up an Instant Messaging server on CentOS 5.6 using a free and open source XMPP based IM server.

This tutorial shows how you can enable Compiz Fusion on an Ubuntu 11.04 (Natty Narwhal) desktop with the Unity interface (the system must have a 3D-capable graphics card which I assume it has because otherwise Unity wouldn't start, and GNOME would be used instead). With Compiz Fusion you can use beautiful 3D effects like wobbly windows or a desktop cube on your desktop.

This is a tutorial about how to set up a PostgreSQL replicated hot standby server with streaming replication, and we also set up repmgr to monitor and manage the replication cluster. Unlike most tutorials that copy the database file from master to slave (or standby) in the middle of running pg_start_backup() and pg_end_backup(), repmgr is used to simplify the whole procedure.

This document describes how to install a Postfix mail server that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses. The resulting Postfix server is capable of SMTP-AUTH and TLS and quota. Passwords are stored in encrypted form in the database. In addition to that, this tutorial covers the installation of Amavisd, SpamAssassin and ClamAV so that emails will be scanned for spam and viruses. I will also show how to install SquirrelMail as a webmail interface so that users can read and send emails and change their passwords.

This tutorial explains the installation of a Samba fileserver on OpenSUSE 11.4 and how to configure it to share files over the SMB protocol as well as how to add users. Samba is configured as a standalone server, not as a domain controller. In the resulting setup, every user has his own home directory accessible via the SMB protocol and all users have a shared directory with read-/write access.

This tutorial describes how you can set up an development environment for building Android apps on an Ubuntu 11.04 desktop using Eclipse, the Android SDK, and PhoneGap. I will describe how to build Android apps from the command line with PhoneGap and from the GUI with Eclipse and PhoneGap and how to test them in an Android emulator and on a real Android device. PhoneGap allows you to develop your Android applications using web technologies such as HTML, CSS, and JavaScript (e.g. with JavaScript libraries such as jQuery/jQTouch), and it will turn these web apps into native Android apps (in fact, PhoneGap supports multiple platforms such as Android, iPhone, Palm, Windows Mobile, Symbian, so you can use the same sources to create apps for multiple platforms).

This tutorial describes how to migrate from trac to redmine. Originally written to perform an upgrade from trac 0.10.3 (old etch server) to Redmine 1.0.1 (squeeze) but was successfully tested with trac 0.11 and 0.12, as well as Redmine 1.0.5 and 1.1.2 (1.2 is also working. This version was also tested to produce the upstream patch but not intensively).

This tutorial shows how you can set up a Fedora 15 desktop (GNOME) that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge.

This document describes how to integrate Postfix/Dovecot with Microsoft Active Directory on CentOS 5.x, and you can manage mail users in Microsoft Active Directory. You will learn how to enable Postfix to look up email addresses in Active Directory and how to enable Dovecot to authenticate against Microsoft Active Directory.

Lighttpd is a secure, fast, standards-compliant web server designed for speed-critical environments. This tutorial shows how you can install Lighttpd on an Ubuntu 11.04 server with PHP5 support (through FastCGI) and MySQL support.

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 11.04 server with PHP5 support (through PHP-FPM) and MySQL support.