One of the best methods of restricting SPAM is to require address verification. This means that Postfix will initiate a SMTP session with the client’s server to verify that it is a legitimate address. This takes time and resources but…it a very effective way to deal with SPAM. You will need to add the reject_unverified_sender option.

Almost every laptop on sale today comes equipped with the Kensington security slot on the side or back, through which you can connect a theft-deterring locked steel cable. As an alternative, the free software utility Adeona won't preemptively deter theft, but it will help you track down your stolen equipment and better the chances of its recovery by police.

Umit is a user-friendly graphical interface to Nmap that lets you perform network port scanning. The utility's most useful features are its stored scan profiles and the ability to search and compare saved network scans.

With my parents living in Italy, my phone bill is often a little on the scary side when I see it each month. That was until recently, when my parents’ tiny village in the middle of the mountains where they run a bed and breakfast finally got broadband.

VirtualBox 2's guest additions provide better display drivers, mouse pointer integration, seamless windows, and more. If you're doing much work in a virtual machine you should have them installed.
VirtualBox 2's guest additions have been improved over older versions.

"Today, I spent some time looking at better ways to organize the Portage tree in git, and I'm interested in getting feedback on what I've done. Please take a look at my new portage-new git repository..."

Mail merge, the production of multiple documents that differ only in minor details, remains a difficult task in OpenOffice.org Writer. Few use the function regularly, and when they do, the mail merge wizard seems to cause as much confusion as it resolves. FastMailMerge is not only simplicity itself, but a welcome relief that easily lives up to its name.

With the most recent Catalyst 8.9 Linux driver release there is support for MultiView on FireGL and FirePRO graphics cards. This allows the user to use multiple graphics cards together in order to build a single X server that spans all of these displays.