In this installment we introduce the concept of data streams, looking at the three system streams STDIN, STDOUT $ STDERR, and then look at how we can use the pipe operator connect the output of one command to the input of another.

In this installment we wrap up our look at the environment by describing command line aliases, and looking at how we can customize the prompt we see when working at the command line.

In this installment we continue to explore the environment, focusing on the very important environment variable PATH.

In this installment we introduce the rather nebulous concept of the Unix/Linux environment, and we look at environment variables and shell variables.

In this installment we look at how to read and edit text files from the command line.

Unix, Linux and OS X have a built-in manual describing how the various terminal commands work. In this installment we look at how to access this manual, and explain the special language used within.

In this installment we learn how to control processes - creating them, and ending them.

In this installment we explore the concept of Linux/Unix processes, and we introdue the ps command for viewing the running processes.

In this installment we look at file management from the commandline - creating, copying, moving, renaming, and deleting files and folders.

In this installment we’ll start by biting the bullet and dive into how to alter standard Unix File permissions. This could well turn out to be the most difficult segment in this entire series, regardless of how big n gets, but it is very important, so if you have trouble with it, please don’t give up.