Linux Administration Bootcamp: Go from Beginner to Advanced - Environment Variables

This video tutorial explains environment variables, their role in affecting program behavior, and how to manage them in Linux. It covers viewing variables with printenv and echo, creating and updating them using export, and removing them with unset. The tutorial also discusses making variables persist across sessions by adding them to initialization files like bash_profile. Practical examples, such as setting the time zone, illustrate these concepts. The video concludes with guidance on finding environment variables used by programs through their man pages.

What command would you use to remove an environment variable?

How can you make environment variable settings persist between logins?

What is the purpose of checking a program's man page regarding environment variables?