Shell Variables & Sha-Bang Usage

• User-defined variables, arrays, and command-line arguments.

Shell Operators & Control Structures

• Arithmetic, relational, logical & file test operators.

Conditional Statements & Looping Structures

• Single and multi-conditional statements for decision-making.
• Loops (for, while, until) for iterative execution.

Unix Filters for Data Processing

• Working with grep, cut, paste, sort, tr, tee, sed, and awk.