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Understanding Operating System Services

Jan 31, 2025

Lecture: Operating System Services

Introduction

  • Overview of Operating System (OS) services.
  • Importance of OS in managing computer resources and user interactions.

Key Functions of Operating Systems

  1. Process Management

    • Creation and deletion of processes.
    • Suspension and resumption of processes.
    • Provides mechanisms for process synchronization and communication.
  2. Memory Management

    • Keeps track of each byte in a computer's memory and allots memory to processes.
    • Handles memory allocation and deallocation.
    • Provides protection and management of memory.
  3. File System Management

    • Organization, storage, retrieval, naming, sharing, and protection of files.
    • Provides a file directory structure.
  4. Device Management

    • Manages device communication via drivers.
    • Handles device requests and status reports.
  5. Security and Protection

    • Protects against unauthorized access to resources.
    • User authentication and data encryption.
  6. Network Management

    • Facilitates networking operations and connectivity.
    • Manages network protocols.

User Interface Services

  • Command Line Interface (CLI)

    • Text-based interface for command input.
  • Graphical User Interface (GUI)

    • Visual interface for easier interaction.

System Calls

  • Mechanism for user applications to interact with OS.
  • Types of system calls include:
    • Process control calls.
    • File management calls.
    • Device management calls.
    • Information maintenance calls.
    • Communication calls.

Conclusion

  • OS services are critical in ensuring smooth operation and management of computer systems.
  • Continuous evolution to meet new computing demands.