Many KDE 3 users depended on Krun, a simple yet effective application used to execute commands. Executed simply by pressing “Alt-F2″, it was much easier to start applications using it, rather than navigating through a launch menu or opening a terminal window. The only catch with Krun was that you had to know the exact name of the command you intended to launch.  With the advent of KDE 4, that has all changed.

Krunner operates independently of the Plasma desktop system as a standalone application. It includes a ton of features that make it useful beyond simple command launching.  It has retained many of the features present in KDE 3 and greatly expanded them. We would fail to do it justice if we did not give it a top ten list.

Quite possibly the most distinguishing feature of Debian-based Linux distributions (such as Ubuntu, Mepis, Knoppix, etc) is their package system – APT. Also known as the Advanced Package Tool, APT was first introduced in Debian 2.1 in 1999.  APT is not so much a specific program as it is a collection of separate, related packages.

With APT, Linux gained the ability to install and manage software packages in a much simpler and more efficient way than was previously possible. Before its introduction, most software had to be installed either by manually compiling the source code, or using individual packages with no automatic dependency handling (such as RPM files).  This could mean hours of  “dependency hell” even to install a fairly trivial program.

In this article, we are going to highlight some of APT’s best features, and share a few of the lesser known features of APT and its cousin dpkg.  Believe it or not, APT can even be used to solve Sodoku puzzles!