Environment variables are dynamic values that affect the behavior of processes on a computer. They are used to store configuration settings and information that can be accessed by applications and scripts. Here are some key points:
- Key-Value Pairs: Environment variables are typically defined as key-value pairs (e.g.,
KEY=value). - Scope: They can be global (available to all processes) or local (available only to the current session or process).
- Usage: Commonly used to store information like user preferences, system paths, and configuration settings (e.g.,
$HOME,$PATH,$USER). - Access: In scripts, you can access them using the
$symbol (e.g.,$HOME).
They play a crucial role in configuring the environment for applications and scripts, allowing for flexibility and customization. If you need more details or examples, let me know!
