Variables

Shell variables store system or user-defined data that can change during script execution. Two categories exist: System Variables (PATH, HOME, PWD) created by Linux, and User-Defined Variables created by users. Define variables with = operator and retrieve values with $ prefix. Example: MY_VARIABLE="Hello World" then echo $MY_VARIABLE prints the value.

Visit the following resources to learn more:

• @article@Learning The Shell
• @article@How to Use Variables in Bash Shell Scripts
• @article@How To Read and Set Environmental and Shell Variables