Found 2065 Articles for Operating System

The operating system is software which handles the computer's functionality like scheduling, input/output operation resource allocation, file system manipulation, etc.It acts as an interface between the computer hardware and the user.Operating Systems ServicesThe services offered by the operating system are as follows −Input/Output operationResource allocationFile system manipulationUser interfaceProgram executionCommunicationSecurityThe two main roles of the operating system are −Resource ManagementSecurityAll the resources like Input/Output device, Memory, Processor, Device, and File are managed by the operating system.The operating system is responsible for any unauthorized access to the computer data or program or software. This security feature of the operating system protects the ... Read More

Operating systems work as an interface between the user and the computer hardware. OS is the software which performs the basic tasks like input, output, disk management, controlling peripherals etc. Windows, Linux etc are some examples of operating systems. Operating System Evolution  Operating system is divided into four generations, which are explained as follows − First Generation (1945-1955) It is the beginning of the development of electronic computing systems which are substitutes for mechanical computing systems. Because of the drawbacks in mechanical computing systems like, the speed of humans to calculate is limited and humans can easily make mistakes. In ... Read More

The main operation performed by operating system is to carries out is the allocation of resources and services, such as allocation of the following −MemoryDevicesProcessorsInformationThe operating system includes programs that are helpful to manage these resources, such as a traffic controller, a scheduler, memory management module, I/O programs, and a file system.Functions of Operating SystemsLet us discuss the function of the operating system (OS) in detail.SecurityThe operating system uses a password protection to protect user data it also prevents unauthorized access to programs and user data, but for external functionality we need to install malware software to protect the system.Control ... Read More

A computer has several modules, with possibly more than one instance of each.The system hardware consists of the following −KeyboardDisplayPrinterCPU BoardMemory BoardI/O BoardThe keyboard, display and printing devices need an interface so that it interacts with the system and the I/O board provides that interface for communication, that interacts is a system bus.The figure given below is of the computer hardware−Processor/CPUIt is the heart of the computer that controls the operations of the computer and also performs the data processing functions.CPU performs the operations like exchanging data with memory with the help of memory address register and memory buffer register.CPU ... Read More

The operating system (OS) acts as a manager for all the I/O device, memory, CPU, file storage resources and allocates them to specific programs and users, whenever necessary to perform a particular task. Therefore, the operating system is the resource manager that means it can manage the resources of a computer system internally.The operating systems are important and should be correctly used when writing the user applications. Large and complex systems have high economic impact and this result in interesting problems of management.Few systems are involved in the design and implementation of OS but, nevertheless many general techniques have to ... Read More

A modern computer consists of the following −One or more processorsMain memoryDisksPrintersVarious input/output devicesSo, in order to manage all these components, we require a layer of software in the computer system, that layer we call the Operating System (OS).DefinitionAn Operating System is a program that acts as an intermediary or interface between a user of a computer and the computer hardware. It is the most important type of system software in computer systems.Without an operating system the user cannot run application programs on the computer system.Generally, a computer system consists of four main components, called hardware, application programs, operating system, ... Read More

A computer system consists of many resources like hardware and software, which are useful to complete a task. The common required resources are input/output devices, memory, file storage space, CPU etc.The operating system acts as a manager for all the above resources and allocates them to specific programs and users, whenever necessary to perform a particular task. Therefore, the operating system is the resource manager that means it can manage the resources of a computer system internally. The resources are processor, memory, files, and I/O devices.An operating system is the interface between the user and the machine. Before there were ... Read More

When you create a Dockerfile, you can use two different commands to build your context. Building a context means including the files and directories that you want from your local machine, to be in your container when it’s created. These files may be directories in your local machine, a URL from which you want to download files, or a compressed tarball file that you want to include as it is or after extracting the tarball file.We can use two different instructions to add the files from the build context in the local machine to the Docker container. These are the ... Read More

We can build Docker images by specifying instructions inside a Dockerfile. Dockerfile allows us to specify step-by-step instructions which define the rules for making a container environment. The Docker containers are created for specific tasks and processes to be run inside them. There are three important instructions that are used inside a Dockerfile which lets us define which processes need to be run inside the containers and in what sequence and order.These 3 instructions are -RUNCMDENTRYPOINTThe RUN instruction is quite simple. We can define simple subcommands along with the RUN instruction that we want to execute inside the container. For ... Read More

Vagrant is a software that allows you to create a virtual machine that replicates the user's experience exactly as they want to set it up. Specifically, Vagrant allows you to test your application in a specific environment by mirroring the OS and all appropriate configurations.Whereas Docker is a framework that lets you containerize your app and build so-called microenvironments for deploying it without having to run a whole VM. Each container is a separate isolated environment that contains a unique application environment.As a result, programmers, testers, and DevOps engineers are able to spend less time debugging and identifying important bugs ... Read More