For this article, I'm returning to portable science software on Android. In a previous article, I looked at a program called xcas/giac. This program is an open-source engine that is used to handle symbolic manipulation of mathematical equations. Because it is open source, it has been ported to several different platforms.

I've mentioned many times before the questionable nature of downloading video game ROMs in order to emulate them on your computer.

In my last two articles, I looked at the Django Web application framework, written in Python. Django's documentation describes it as an MTV framework, in which the acronym stands for model, template and views.

Lightweight virtual containers with PID 1. In this article, I demonstrate a method to build one Linux system within another using the latest utilities within the systemd suite of management tools. The guest OS container design focuses upon BusyBox and Dropbear for the userspace system utilities, but I also work through methods for running more general application software so the containers are actually useful.

In my last article, we began an exploration of date math by validating a given date specified by the user, then explored how GNU date offers some slick math capabilities, but has some inherent limitations, the most notable of which is that it isn't on 100% of all Linux and UNIX systems.

In June 2013, we had the unfortunate luck of a basement flood, caused by a tripped electrical breaker connected to our sump pump. There are so many things that can go wrong with a sump pump. You always are on guard for power outages, blown breakers, sump pump failures, clogged pipes and all manner of issues that can arise, which ultimately can end with a flooded basement.

I have been focusing a lot on security and privacy issues in this year's columns so far, but I realize some of you may expect a different kind of topic from me (or maybe are just tired of all this security talk). Well, you are in luck.

Scheduling means different things depending on the audience. To many in the business world, scheduling is synonymous with workflow management. Workflow management is the coordinated execution of a collection of scripts or programs for a business workflow with monitoring, logging and execution guarantees built in to a WYSIWYG editor.