Once in a while, you come across a gem that you just want to share with others. I recently stumbled upon OpenDNS, and I've had such a good experience with it, I thought I'd write a bit about it. For the record, I have no affiliation with OpenDNS, except that I'm a happy user of this free service.

[Shawn Powers was barely out of high school when the first issue of Linux Journal went to press 15 years ago, but we figured it would be fun to send him back in time and write a column for the first issue. Besides, how else could we claim a tax write-off on a time machine?]

If you have ever had a hard drive fail on a remote server you may remember the feeling you had after trying to issue the following commands:

This "Linux Product Insider" features the Robot, Gizmo & Gadget Show, Microway's NumberSmasher vSMP servers, Excito's Bubba Two Home Server, Van Lindberg's Intellectual Property and Open Source and Running Xen: A Hands-On Guide to the Art of Virtualization.

I've recently written about using bash arrays and bash regular expressions, so here's a more useful example of using them to test IP addresses for validity.

This "Linux Product Insider" features CrossOver Linux 7.0, Skype 4.0 beta, Scoofers Search Engine, BakBone Software's NetVault, MEN Micro's DC1 Rugged Display Computer and PostPath Server HA Edition v2.

If you work with the command line you've most likely used hexdump or od to dump binary files, but what do you do if you have a hex dump of something and you want to create the binary version of the data? Assuming your needs aren't too complex, the answer may be xxd. You can use xxd to dump binary files just like hexdump and od, but you can also use it to do the reverse: turn a hex dump back into binary.

This week's "Linux Product Insider" features Red Hat Enterprise Linux 5.2, Astaro Security Gateway 7.2, SugarCRM Data Center Edition, Struts 2 in Action, NAG Toolbox for MATLAB and eXtremeDB Fusion powers DIRECTV.

Hardware manufacturers often don't release specifications of their products to the open source community, so programs like ndiswrapper become necessary. This video demonstrates how to use Windows wireless drivers in Linux using ndiswrapper.

You may recall about 4 months ago, I reviewed the Eee PC. As it turned out, the computer was actually a gift from my wife, so unlike many of the other products I review, I got to keep it.