grep (search), sed (stream editor), awk (data manipulation), cat (view content), cut , sort .
Used to store data. In shell, all variables are treated as strings. Example: name="John" ; echo $name (access variable with $ ). Control Structures: Unix Shell Programming
| : Pipe output from one command as input to another (e.g., ls | grep "txt" ). Used for modularity and reusability. 3. Essential Tools and Commands grep (search), sed (stream editor), awk (data manipulation),
Use a text editor like vi or nano to create a file, e.g., script.sh . sed (stream editor)
Unix shell programming is essential for manipulating files, automating tasks, and enhancing productivity. It allows users to leverage the "Unix philosophy" of combining small, specialized tools to build complex workflows.