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This article will explain in detail what the functions of the computer operating system are. Xiaobian thinks it is quite practical, so share it with you as a reference. I hope you can gain something after reading this article.

The functions of the computer operating system are: 1, process management;2, memory management;3, disk and file system;4, network;5, security;6, internal communication security;7, user interface;8, driver.

Operating environment: Windows 7, Dell G3 PC.

Main functions of the operating system:

1. Process management

Both resident programs and applications run on a process basis. When a computer is von Neumann structured, each CPU can run at most one process at a time.

2. Memory management

The operating system's memory management provides functions such as finding available memory space, configuring and freeing memory space, and swapping memory and low-speed storage packets. This feature, also known as virtual memory management, greatly increases the amount of memory available to each process.

Disk and File Systems

Operating systems have many types of built-in file systems. Linux, for example, has a wide range of built-in file systems such as ext2, ext3, ext 4, ReiserFS, Reiser4, GFS, GFS2, OCFS, OCFS2, NILFS, and Google File System. Linux also supports non-native file systems such as XFS, JFS, FAT family, and NTFS.

4. Network

Many modern operating systems are capable of operating TCP/IP, the dominant Internet communication protocol. This means that operating systems can enter the online world and share resources such as files, printers, and scanners with other systems.

5. Security

The operating system provides direct or indirect external access to resources such as files on local disk drives, protected privileged system calls, users 'private data, and services provided by programs running on the system.

6. Internal communication security

Internal information security can be seen as a means of preventing running programs from accessing system resources arbitrarily. Most operating systems allow ordinary programs to operate directly on the computer's CPU, so there are problems such as how to force a program to stop, an operating system that can handle transactions and run the same special instructions, in which case the operating system is just another parallel program.

CPUs produced for general-purpose operating systems typically implement some degree of special instruction protection concepts at the hardware level. Programs with lower privilege levels are often prevented from running special instructions, such as direct access to external devices such as hard drives.

7. User Interface

Most operating systems today include a graphical user interface (GUI). Some older operating systems tightly integrated the GUI with the kernel, such as the earliest Windows and MacOS implementations.

8, the driver.

A driver is computer software designed to interact with hardware. It is usually a well-designed device interaction interface that provides information sorting and receiving functions for the device through a computer aggregation subsystem or communication subsystem connected to the hardware. and ultimately provide the message to the operating system or application.

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