Shell Variables – Importance & Usage

In Linux, a shell variable is a name given to a value that can be used and modified within the shell. These variables are used to store information like usernames, paths, options, or temporary values that can make working in the shell easier and more efficient.

Importance of Shell Variables

1. Simplifies commands – Instead of typing long paths or values repeatedly, we can store them in a variable.

2. Provides flexibility – Variables allow scripts to handle dynamic values without hardcoding.

3. Controls shell behavior – Some special shell variables (like PATH, HOME, USER) define how the shell operates.

4. Supports automation – In shell scripts, variables help in storing user inputs, command outputs, or intermediate results.

Usage with Examples

1. Creating and Using Variables