Last Updated on March 2, 2023 by Prepbytes
In this blog, we will learn about operating systems, the use of operating system followed by the components of operating system, we will learn in detail about each component of operating system a detail. We will also discuss the meaning and use of every components of operating system, and their function.
What is Operating System?
There are various parts of computer present and the operating system is one of them. An operating system (OS) is a software program that acts as a bridge between a computer’s hardware and its user. It manages the computer’s resources and provides a platform for other software to run on. Some of the most common functions of an operating system include managing memory, processing power, and storage; managing input and output operations; providing a user interface; and managing security.
There are several different types of operating systems, including Windows, macOS, Linux, and Unix. Windows is the most widely used operating system for personal computers, while macOS is primarily used on Apple computers. Linux and Unix are typically used for servers and other specialized applications.
An operating system also provides a layer of abstraction between the software and hardware, allowing the software to run on a wide range of hardware without needing to be specifically designed for each individual piece of hardware. This abstraction also allows for different software programs to communicate and interact with one another, as well as with the hardware.
Another important function of an operating system is managing and allocating resources, such as memory and processing power, to different software programs running on the computer. This ensures that each program has the resources it needs to function properly, while also ensuring that the resources are shared fairly among all programs.
In addition, operating systems also often include built-in security features to protect the computer and its data from unauthorized access or malicious attacks. These security features can include password protection, encryption, and firewalls.
Overall, operating systems are an essential component of any computer system, providing a platform for software to run on and managing the computer’s resources and security. Without an operating system, a computer would not be able to function properly.
Important Components of Operating System
There are various components of operating system available but here we will discuss the most important components of operating system the list of all the important components of operating system is given below:
- Process Management
- Command Interpreter
- Security Management
- Secondary Storage Management
- Files Management
- System calls
- Network Management
- I/O device
- Main Memory management
Now we will discuss each of the components of operating system briefly.
1. Process Management
Process management is one of the key components of operating system that involves creating, scheduling, and terminating processes. A process is a program that is in execution and has its own memory space and system resources.
When a user runs a program, the operating system creates a new process for it and assigns it a unique process ID. The process is then added to a queue of ready processes, where it waits to be scheduled for execution by the operating system’s scheduler. The scheduler uses various algorithms to determine which process should be executed next, based on factors such as priority level and resource requirements.
The operating system also manages the resources used by processes, such as memory and processing power, to ensure that each process has the resources it needs to function properly.
Processes can also communicate with each other through inter-process communication (IPC) mechanisms, such as pipes and sockets, provided by the operating system. The operating system also provides mechanisms for synchronizing and coordinating the actions of multiple processes, such as semaphores and monitors.
When a process completes its execution or is terminated by the user, the operating system releases any resources the process was using and removes it from the queue of ready processes. This ensures that resources are used efficiently and the computer’s performance is not affected negatively by unnecessary processes.
Overall, process management is a critical function of an operating system that ensures that processes are created, scheduled, and terminated efficiently and that the computer’s resources are used effectively.
2. Command Interpreter
The components of operating system with the most wide use is a command interpreter. A command interpreter, also known as a shell, is a program in an operating system that interprets and executes commands from users or other programs. It provides an interface for users to interact with the system, allowing them to launch programs, navigate the file system, and perform other tasks. The most common type of command interpreter is the command-line interface (CLI), where users enter commands through a text-based interface.
Different operating systems have different command interpreters, such as the Windows Command Prompt, and macOS and Linux’s Bash. CLI shells generally have a prompt that indicates the system is ready to receive commands, and users enter commands by typing them in and hitting enter. The command interpreter then parses the command and sends it to the appropriate part of the operating system for execution. Some shells also support command history and tab completion, which makes it easier for users to navigate the system and enter commands quickly.
Signals are one of the components of operating system. In an operating system, signals are a way for one process to communicate with another. They are typically used to notify a process that a particular event has occurred, such as a keyboard interrupt or a child process exiting. Signals can be generated by the operating system itself or by other processes. A process can choose to either handle the signal or ignore it. Signals can also be used to terminate a process or force it to terminate. Common signals include SIGHUP, SIGINT, and SIGTERM. Signal handling is implemented differently in different operating systems, but the basic concept is the same. The signals have a special property in which it can temporarily suspend the current running process and stores its information in the stack and starts running the special handling procedure.
4. Security Management
Operating systems include various security management features to protect the system and its resources from unauthorized access and malicious attacks. These features can include things like user authentication, access control, encryption, and firewall protection. User authentication ensures that only authorized users can access the system, while access control determines what resources and operations a user are allowed to access and perform. Encryption is used to secure data and communications, and firewall protection is used to block unauthorized access to the system over a network. Additionally, many operating systems also include security monitoring and incident response capabilities to detect and respond to security incidents. Overall, security management in operating systems is an essential aspect to protect the system and its resources from unauthorized access and malicious attacks.
5. Secondary Storage Management
Secondary storage simply refers to the memory storage where the user can store the data and from where the user can easily retrieve the stored data and management of that space is an important components of operating system. Secondary storage management in operating systems refers to the management of non-volatile data storage devices such as hard drives, solid-state drives, and external storage devices. This includes tasks such as allocating space on these devices, managing files and directories, and providing access to the stored data. The file system, which is a part of the operating system, is responsible for these tasks. It organizes the storage space on the secondary storage devices and provides a logical view of the stored data to the user and applications. Common file systems include NTFS, FAT32, and ext4.
6. Files Management
Files are used for long-term storage. File management is one of the components of operating system and it refers to the process of organizing, storing, and accessing files on a computer. The operating system’s file system is responsible for managing files and directories, which includes creating, deleting, and modifying them. The file system organizes the files and directories in a hierarchical structure, with the root directory at the top, followed by subdirectories and files. Each file and directory is assigned a unique name and location on the storage device. The operating system provides interfaces for users and applications to access and manipulate files, such as creating, reading, writing, and deleting files. Additionally, file permissions can be set to control access to files and directories by different users and applications. File management mainly includes three steps they are File creation, File deletion, and read and write operations.
7. System Calls
A system call is a request made by a program to the operating system for a specific service or operation to be performed. These calls are typically made using a specific set of instructions or functions that are provided by the operating system. Examples of common system calls include requests for input/output operations, memory management, and process management. The operating system then carries out the requested operation and returns any results or status information to the calling program.
8. Network Management
As the world is evolving so are the network complexities of the system and to provide the user the best experience of the network we have to maintain the network hence network management is one of the important components of operating system. Network management in operating systems involves controlling and monitoring the communication between computer systems on a network. This includes tasks such as configuring network interfaces, managing network connections, and monitoring network traffic. The operating system also provides APIs (Application Programming Interfaces) and libraries to help applications make use of the network. Network management in OS also includes a variety of security features to protect against unauthorized access and malicious activity. Examples include firewalls, VPNs, and intrusion detection/prevention systems. Additionally, network management includes monitoring and troubleshooting network issues and providing network statistics for performance analysis.
9. I/O device management
Input and output devices are an essential part of the operating system hence the management of these devices is an important components of operating system. Operating systems manage input/output (I/O) devices to ensure that data can be properly transferred between the computer and the device. This is accomplished through the use of device drivers, which are specialized programs that act as a bridge between the operating system and the device. The operating system communicates with the device driver, which in turn communicates with the device. This allows the operating system to control and manage the device and enables it to perform tasks such as reading and writing data, as well as controlling the device’s functions. In addition, the operating system also manages the allocation of resources such as memory and processing power to ensure that the device can function efficiently.
10. Main Memory Management
Main memory is very essential for processes and hence its management is an important components of operating system. In operating systems, main memory management is the process of controlling and coordinating the use of memory by multiple programs and processes. This includes managing the allocation of memory to different programs and processes, as well as managing the movement of data between main memory and other storage devices, such as hard drives. Memory management also includes managing memory allocation for system processes and managing memory allocation for different levels of the system, such as the kernel and user space. Memory management is a critical aspect of operating system design, as it helps to ensure the efficient and stable operation of the system.
In this article, we learned about the operating system and have a brief idea about the operating system, its uses, and features after that we have seen the list of some of the important components of operating system. After that, we discussed each and every component mentioned above in the blog, at last, we will be answering some frequently asked questions.
Frequently Asked Questions
1. What is the main function of command interpreter?
The main function of a command interpreter is to provide an interface for the user to interact with the operating system.
2. How many operating systems are there?
There are many operating systems available like:
3. What is the core of the operating system?
The core of the operating system is a kernel. It is also among one of the parts of the operating system.