The operating system is the system software that manages the computer's "hardware" resources and "software" resources. The operating system is the core of the system software; after the computer is started, the operating system must first be loaded into the memory. It will control and support other programs running on the same computer, and provide unified and effective management of all software and hardware resources in the computer. and control.
The operating system (OS) is a computer program that manages computer hardware and software resources.
The operating system is the core of the system software. After the computer is started, the operating system must first be loaded into the memory, which will control and support other programs running on the same computer, and provide unified and effective management and control of all software and hardware resources in the computer. Among all software, the operating system is the most basic, most important, and closest to the hardware. It is the first development and expansion of the functionality of "bare metal".
The operating system needs to handle basic matters such as managing and configuring memory, determining the priority of system resource supply and demand, controlling input and output devices, operating the network and managing the file system. The operating system also provides an operating interface for users to interact with the system.
The operating system mainly includes the following functions:
①Process management, its work is mainly process scheduling. In the case of a single user and a single task, processing The server is exclusive to one task for one user, and process management is very simple. However, in the case of multi-programming or multi-user, when organizing multiple jobs or tasks, it is necessary to solve the problems of processor scheduling, allocation and recycling.
② Storage management is divided into several functions: storage allocation, storage sharing, storage protection, and storage expansion.
③Device management has the following functions: device allocation, device transmission control, and device independence.
④File management: file storage space management, directory management, file operation management, and file protection.
⑤Job management is responsible for processing any requirements submitted by users.
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