Use nmap to discover network elements and to scan ports on those network elements, learn here how to install nmap GUI front ends, and how to use them.

"A long time ago (February 28th, 2005 to be exact), I wrote a post titled Add and Remove HTML elements dynamically with JavaScript. To this day, it continues to be the most highly traffic page on my website. However there is a number of things I’d like to point out that we can improve upon that implementation (since it is very outdated), and for the record, retract my three year old statement where I said “I hate JavaScript.” That simply isn’t true anymore, and it hasn’t been true for a while now. Nevertheless, let’s move onto business. Here’s how you can simply add and remove HTML elements..."

Ajax developers are turning away from commercial development tools and opting for free, open source alternatives.

"Many professionals bill clients for their time. Even if you don't, keeping track of the time you actually spend on tasks can help you improve your time estimates and check if you're spending enough time on the things that are important to you. For example, keeping track of the time you spend on tasks might show you that you spend two and a half hours each day just responding to e-mail. If you can identify problem areas like that, then you can look for more effective ways to perform the tasks that take up a lot of your time. I love Org's timeclocking support, and I think you will too. Because it's integrated with your task list, you don't have to switch to separate application or reenter data. You can get more detailed time reports, too.

"I have joined up with some of the guys from ODYNUG who have started meeting for breakfast and learning Common Lisp together. We are all using some version of Emacs, SLIME, and SBCL. Blaine shared a cool way to make SLIME load much faster..."

"So you want to use Org as day planner. I'll show you the bare minimum that you need in order to use Org to manage your tasks day by day. I assume that you've set up Org and Remember according to the basic configuration suggested in "Setup." If you haven't done that yet, please review the section on "Setup", then return here..."

"If you're the kind of person who likes scribbling free-form tasks and notes in your day planner, then Planner might be a good fit for you. In this blog post, I'll show you how to use Planner to organize the things you need to do by the day you need to do them, check the things you need to do, mark tasks complete, and review what you've finished. I assume that you've already got GNU Emacs 22 installed and that you're comfortable with using Emacs as a text editor, although it might not yet be your way of life. (Just you wait! Planner was the thing that pushed me over the edge. ;) ) ..."

I have previously installed KDE 4.0 RC2 on Kubuntu. It involved adding deb http://ppa.launchpad.net/kubuntu-members-kde4/ubuntu gutsy main to your /etc/apt/sources.list and then installing a few KDE4 based packages. To be true, I was not able to do that using Adept, the Kubuntu package manager. I had to go to command line and then the install went fine.
OpenSUSE, however, changes the entire perspective of installing applications. Their revolutionary 1-Click install performs the job very well here too. All we need to do is to goto KDE4 page on OpenSUSE website and click the install button.