Unix Shell Programming -

ls (list), cd (change directory), mkdir (create directory), mv (move/rename), rm (delete).

A Unix shell is a command-line interpreter that acts as an interface between the user and the operating system. Shell programming (or scripting) involves writing a series of commands in a plain text file, which the shell executes sequentially. It enables automation of repetitive tasks, system management, and complex data processing. 2. Key Components of Shell Scripts Unix Shell Programming

ps (view processes), kill (terminate process). Arithmetic: expr or $((expression)) for calculations. 4. Basic Structure of a Shell Script ls (list), cd (change directory), mkdir (create directory),

Use a text editor like vi or nano to create a file, e.g., script.sh . Arithmetic: expr or $((expression)) for calculations

grep (search), sed (stream editor), awk (data manipulation), cat (view content), cut , sort .

Use set -e to exit the script immediately if a command fails, enhancing reliability.

This write-up provides an overview of , a powerful skill for automation, system administration, and workflow optimization in Unix-like environments (Linux, macOS). 1. What is Unix Shell Programming?