Operating systems

Operating systems

1. Is a system from the software

   • An operating system is a system from the software that controls the computer's hardware and software and provides common services like starting a program. A computer without an operating system is useless

2. Types of operating systems

   • Templated
     • It refears to creating a a single virtual machine image as a guest OS, then saving it as a tool for multiple running virtual machines
   • Distribuded
     • Manages a group of distinct computers and meakes them as one
   • Embedded
     • It's designed for operate on small machines like PDA with less autonomy
   • Single and multi user
     • Single user means that the computer can run only one user a tthe same time
     • Multi user means that a computer can run many users at the same time
   • Single and multi-tasking
     • A single-tasking system can run one program at the same time and multi-tasking can run more than one program at the same time
       • Pre-emptive: The operating system slices the CPU time and dedicates a slot for each program
       • Cooperative: Is achieved by realying on each process to provide time to the other processes in a defined manner
   • Real-time
     • It is faster than normal computers and can be single-tasking or multi-tasking
   • Library
     • It's a typical OS. Networking is provide like libraries and images can be deployed to cloud or embedded enviroments

3. Functions of a operating system

   • 2nd: It provides a stable, consestent way for applications to deal with the hardware without having to know all the deatils of the hardware
   • 1st: It manages the hardware and software
     • Software: Time-sharing OS shedule the tasks for a efficient use and also include accounting software for cost allocation of processor time, printing or mass storage
     • Hardware: For hardware functtion(input/output) the OS acts like intermediary between programs and the computer hardware

4. OS development

   • Now computers use Lan or Internet to pass and recive inforamtion and CD and DVD are less common