Starting in the spring 2013, I videotaped the lectures for my MATH 676: Finite element methods in scientific computing course at the KAMU TV studio at Texas A&M. These are lectures on many aspects of scientific computing, software, and the practical aspects of the finite element method, as well as their implementation in the deal.II software library. Support for creating these videos was also provided by the National Science Foundation and the Computational Infrastructure in Geodynamics.

Note 1: In some of the videos, I demonstrate code or user interfaces. If you can't read the text, change the video quality by clicking on the "gear" symbol at the bottom right of the YouTube player.

Note 2: deal.II is an actively developed library, and in the course of this development we occasionally deprecate and remove functionality. In some cases, this implies that we also change tutorial programs, but the nature of videos is that this is not reflected in something that may have been recorded years ago. If in doubt, consult the current version of the tutorial.

Lecture 2.9: A (very brief) introduction to Linux. Part 1: The command line

Much of computational science is done on machines that run the Linux operating system. Conceptually, Linux stems from a long lineage of operating systems that originated from Unix in the late 1960s, but it is a modern operating system with a graphical user interface if that's what you prefer.
Nevertheless, it is often more convenient to interact with Unix (or, for that matter, with Mac OS X or Windows) through the command line interface. In fact, in many of the following lectures, I will do this all the time. This lecture introduces you to some of the basic commands and techniques one uses on the command line. This includes the most common commands and how they can be chained in the form of filters and processors using the vertical-bar operator.
Note: There are many other excellent resources out there that introduce the Unix shell. One of my favorites, from the excellent Software Carpentry project is this lesson with many examples and exercises. There is also a video version of this lesson.

Slides: click here