Unix Shell Programming -

Always use a ( #!/bin/bash ) to ensure the correct shell is used. Add comments ( # ) to explain complex logic.

Run chmod +x script.sh to grant execution permissions. Run the script: Execute with ./script.sh . 6. Best Practices for Shell Programming Unix Shell Programming

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

The first line of a script, e.g., #!/bin/bash , which specifies the interpreter to use. sed (stream editor)

| : Pipe output from one command as input to another (e.g., ls | grep "txt" ). Used for modularity and reusability. 3. Essential Tools and Commands