Want a topside view of possible problems? NagVis is an easy tool for visualizing the status of your network.

Anyone working in information technology knows how hard it is to keep track of inventory, maintenance history, and user support requests. GLPI puts the details in reach.

License issues prevent the integration of ZFS with the Linux kernel, but Linux users can try the highly praised filesystem in userspace.

Get started with strace by examining a pair of "Hello World" programs. Next month, in the second part of this two-part series, I'll take a deeper look at strace output.

Klaus Knopper is the creator of Knoppix and co-founder of the LinuxTag expo. He currently works as a teacher, programmer, and consultant. If you have a configuration problem, or if you just want to learn more about how Linux works, send your questions to: klaus@linux-magazine.com

From time to time, sys admin Charly has to leave the beaten track and concern himself with topics outside of his core competency range. When this happens, it's good to have the right tools on hand.

Learn how to monitor and block attacks without lifting a finger.

The Linux packet filter iptables lacks a function that dynamically enables ports for authenticated users. Portsmith plugs this gap, allowing users to enable their own connections.