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 is the primary function of environment variables?

• To influence program behavior

• To store user passwords

• To manage system updates

• To encrypt data

Which command is used to view all environment variables?

• ls

• printenv

• cat

• echo

How should environment variable names be conventionally written?

• In camelCase

• In uppercase

• In lowercase

• In snake_case

What command is used to create or update an environment variable?

• env

• set

• export

• unset

Which command is used to remove an environment variable?

• clear

• unset

• remove

• delete

How can you make environment variable changes persist across sessions?

• By using the 'save' command

• By restarting the system

• By adding them to '.bash_profile'

• By using 'printenv'

Where can you find information about environment variables used by a program?

• In the program's installation guide

• In the system logs

• In the program's man page

• In the program's source code