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Check your DNS records with dig

Have you ever wanted to query the Domain Name System (DNS) to discover what information it holds about your domain? Do you have some important changes to make to your DNS records and need a way to verify your changes? Here's how to check your DNS records with a tool called dig.

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Increase your available swap space with a swap file

You've finally configured every aspect of your Linux system. All of your devices function, and everything is configured just the way you like it. At least you think so, until you start running out of memory when you have OpenOffice.org and lots of browser tabs open simultaneously. You realize you should have specified a larger swap partition during your install. Does this mean you have to install again from scratch? Happily, no. Here's how to set up some extra swap space on one of your existing partitions.

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Unite your Linux and Active Directory authentication

Authentication is easily one of the most critical services provided by your network infrastructure. It is the gatekeeper for every resource on your network. Workstations, applications, printers, and files would all be open to the world without a system of ensuring that only those people who need any given resource can gain access to it. Once you have accepted the fact that you need authentication, you must decide whether to stay with one network operating system in the interest of a completely homogeneous network, or accept a "best of breed" system that will better fulfill your needs, even though it will complicate your environment. If you choose the second option, often times you are left with a management nightmare, where you have two, three, or even more authentication engines to maintain across your network operating systems.

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Creating PDF files with ps2pdf

For better or for worse, Adobe's Portable Document Format (PDF) is a wildly popular way of exchanging information. On Windows and Mac OS, most people create PDF files by first creating a PostScript file and then using Adobe Acrobat Distiller to generate a PDF. Linux, however, has no version of Distiller. There are a number of ways to create a PDF in Linux, but one of the most popular methods is to use a utility called ps2pdf.

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VNC: Virtually there and back again

By Russell Pavlicek

Virtual Network Computing (VNC) is an unsung treasure of the open source world -- a simple and useful tool for accessing remote computers. Now that I've had the chance to play with VNC I'm hooked on it.

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