Operating Systems Lab Programs

This repository contains a collection of Operating Systems (OS) lab programs and theory notes, implemented in C and shell scripting. These are designed for academic and practical understanding of key OS concepts such as process management, memory management, and file systems.

Table of Contents

• ALP Program
• Classical Problems – Solutions to classical synchronization problems like Producer-Consumer, Reader-Writer, Dining Philosophers.
• Computing Time – Programs to calculate system and user execution time.
• Deadlock – Deadlock detection and avoidance algorithms.
• Disk Scheduling Algorithms – FCFS, SSTF, SCAN, C-SCAN, etc.
• Matrix Operations – OS-relevant matrix operations.
• Multi-Threading Theory – Theoretical concepts of multithreading.
• MultiThreading – Practical implementation using pthread.
• Page Replacement Algorithms – FIFO, LRU, Optimal algorithms.
• Read and Copy File Content – Programs to demonstrate basic file handling.
• ShellAdvanceProgram – Advanced shell scripting examples.
• System Call – Demonstration of Linux system calls like fork(), exec(), wait().
• Zombie_Orphan – Understanding zombie and orphan processes.
• shellScripting – Basic shell scripting exercises.
• how to run Threaded Code – Instructions for compiling and running threaded C programs.

How to Use

1. Clone the repository:

git clone https://github.com/athrocks/OS.git
cd OS

2. Navigate to any directory and compile the C programs:

gcc filename.c -o outputname -lpthread
./outputname

3. For shell scripts, provide execute permission and run:

chmod +x script.sh
./script.sh

Requirements

• GCC Compiler (for C programs)

• Bash (for shell scripts)

• Linux-based OS recommended for compatibility

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