How to Setup Virtual Machines using Xen
Xen is a great open source platform to create multiple virtual machines in one physical machine. This article describes how to setup a Xen host domain in a PC and how to create a Xen guest domain on it. ...
How does Facebook Connect Authentication work?
Facebook Connect is a mechanism provided by Facebook that lets their users bring their identity and social experience to any website. The first step is authentication - let visitors login to your site with their Facebook accounts. This article explains how that works. ...
Why does the basic Facebook Connect example not work?
You are trying to implement Facebook Connect in your site so that your visitors can log in to your site using their Facebook accounts. You followed the simplest example available in a Facebook wiki document, however for some reason the "Connect with Facebook" button does not seem to do anything - no ...
How to avoid Time Reset in a Cloud Computing environment such as Xen VPS (Virtual Private Server)
Your server is a virtual private server running Fedora (or other linux distro) on a cloud computing service such as RackSpace Cloud Server. For some reason, whenever you change the system time, it gets reset back after a system restart. Why did that happen? Could it be fixed? ...
How to Prevent Web Server Emails from being Marked as SPAM
This article describes what you can do, as the system administor / post master of your mail servers, to make sure emails sent from your mail servers go straight to the inboxes of the recipients instead of landing in their spam/junk folder. Because of the bad guys, good guys have to do a lot more ...
How to Setup DKIM for Postfix in Fedora using dkim-milter
This article describes how to implement DKIM for Postfix in Fedora using the dkim-milter open-source module. This solution has been tested with Fedora 10. ...