This repository contains practical assignments for an Operating Systems (OS) course, focusing on Unix command implementations and system programming concepts. The programs include shell scripts and C ...

Task 1. Write a script to find if a given date actually exists on the calendar In this task, you will write a simple shell script that can determine if the input date is valid or not. The main ...

Mastering UNIX Shell Scripting by Randy Michael. Reviews. by Marco Fioretti. on November 1, 2004. John Wiley & Sons, 2003. ISBN: 0471218219. $45 US. ... The most arcane shell commands and options are ...

Sandra Henry-Stocker was a programmer, Linux systems administrator, security engineer and Linux journalist for most of her 30-year career. She describes herself as "USL" (Unix as a second language ...

BEGIN and END. Two unique patterns, BEGIN and END, execute commands before gawk starts processing the input and after it finishes processing the input.The gawk utility executes the actions associated ...

What you’ll learn: The basics of interacting with computers using the Unix shell (a.k.a. the command line), which is a foundational skill for all other technical computing. You’ll learn how to ...