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

To get the Azure VM sizes available for the availability set, we can use the Get-AzVMSize command with the availability set name. Before running this command make sure that you are connected to the Azure Cloud (if not use Connect-AzAccount) and proper azure subscription (Set-AzContext to set the Azure subscription)Get-AzVMSize `    -ResourceGroupName MYRESOURCEGROUPAVAILABILITY `    -AvailabilitySetName myAvailabilitySetHere the Resource Group name is MyResourceGroupAvailability and the Availability set name is MyAvailabiltyset.Output

There are two ways to retrieve the availability set tags. Using the Tags property inside the availability tag and the second by using the Get-AzTag command.Before running this command make sure that you are connected to the Azure Cloud (if not use ConnectAzAccount) and proper azure subscription (Set-AzContext to set the Azure subscription).First, we will get the availability set properties and retrieve the tag property as shown below.$availablityset = Get-AzAvailabilitySet -ResourceGroupName MYRESOURCEGROUPAVAILABILITY -Name myAvailabilitySet $availablityset.TagsOutputTo get the tags using resource ID, we need to retrieve the resource ID using the Get-AvailabilitySet command.$availablityset = Get-AzAvailabilitySet -ResourceGroupName MYRESOURCEGROUPAVAILABILITY -Name myAvailabilitySet Get-AzTag ... Read More

There are two types of disks available in the Availability Set.Aligned − for the managed disks.Classic − for the unmanaged disks.To get the disk types of the availability set, we first need to retrieve availability set information and then we need to retrieve the SKU property which stores the disk typesBefore running this command make sure that you are connected to the Azure Cloud (if not use ConnectAzAccount) and proper azure subscription (Set-AzContext to set the Azure subscription)To get the availability set information, $availablityset = Get-AzAvailabilitySet -ResourceGroupName MYRESOURCEGROUPAVAILABILITY -Name myAvailabilitySet if($availablityset.Sku -eq "Aligned"){"Managed disk"} else{"Unmanaged disk"}OutputRead More

Virtual machines inside the Availability set get the update automatically, they reboot together and they are used for the patching of the virtual machines.To get the update domain count from the availability set, we can use the below command.Before running this command make sure that you are connected to the Azure Cloud (if not use ConnectAzAccount) and proper azure subscription (Set-AzContext to set the Azure subscription)To get the availability set,$availablityset = Get-AzAvailabilitySet -ResourceGroupName Resourcegroupname -Name AvailabilitySetNameTo get the update domain count,$availablityset.PlatformUpdateDomainCountOutput

The fault domain in the Azure Availability set describes the VMs in the availability set that share the common Power, Storage, network switch, etc. If there is a failure in the fault domain then all the resources in the fault domain will become unavailable.Before running the command make sure that you are connected to the Azure Cloud (if not use ConnectAzAccount) and proper azure subscription (Set-AzContext to set the Azure subscription)$availablityset = Get-AzAvailabilitySet -ResourceGroupName ResourceGroupName -Name AvailabilitySetNameTo get the Fault domain countm$availablityset.PlatformFaultDomainCountOutput