Jack Wallen introduces you to Linux environment variables. What are they and how are they set and unset?

Command interpreters and scripting languages like the Bash shell are essential tools of any operating system. Here's how to use powerful data structures in Bash called associative arrays or hashes.

Noob alert. Windows guy here...Am I overly spoilt by the proliferation of Windows disk cloning tools? I'm having trouble finding the same type of tool for Linux.Scenario: Asterisk-based PBX ...

In a previous column, I showed how to do substring expansion with shell variables in the form of $ {var:start:length}, but it's also useful to know the length of a variable's value. This can be done ...

I have a Jetstor NAS with 2 RAID arrays, both are formatted for OS X, this is used by a couple of Mac Pros for online video editing. What I want to do is use an existing linux box and nightly ...

Shell variables exist in the script or interactive sessions only, where they were declared. In order to make shell variables available outside of their place of origin, they have to be declared as ...

Exploring the nuances of writing a pair-matching memory game and one-dimensional arrays in Bash. I've always been a fan of Rudyard Kipling. He wrote some great novels and stories, mostly about British ...