Linux 101: What are environment variables?

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

Image: Jack Wallen

How many times have you installed something on Linux, only to find out that you need to set certain environment variables before the installation will work? For me, it happens all the time. 

But what are these environment variables, and how do you set them? Let’s dive in and find out. 

SEE: Rust: What developers need to know about this programming language (free PDF) (TechRepublic)

The first thing you should know is what environment variables are. Simply put, environment variables are a set of dynamic named values stored within the system that is used by applications. These variables allow you to customize how specific applications and services behave with the system. Each variable contains a…

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