So in simple words you can complete all the tasks that you do with GUI and much more. In addition, Windows PowerShell has a rich expression parser and a fully developed scripting language. Windows PowerShell providers let you access data stores, such as the Registry and Certificate Store, as easily as you access the file system. Windows PowerShell commands, called cmdlets, let you manage the computers from the command line. NET Framework, Windows PowerShell helps IT professionals to control and automate the administration of the Windows operating system and applications that run on Windows Server environment. Its analogue in Linux is called as Bash Scripting. We'll be looking at looping through groups of objects to perform more complex tasks on a set of items.Windows PowerShell is a command-line shell and scripting language designed especially for system administration. The next article will be the final one in this series. You can use these commands to either filter the data you are viewing or to limit actions (such as stopping services or removing files) to those that match the filters you define. Using the Where-Object and Select-Object commands allows you to easily control which items you are working on in PowerShell. Get-Process | Select-Object -Property Name, Id This example will return the name and PID of all processes running on the system: For example, we may want to see just the first 5 files in a folder:Ĭonversely, you may want to see just the last 5:įinally, this command can also be used to choose which properties are retrieved and displayed. There are many different ways to use it, but a common one is to select the first N results of another command. This command is used to limit or modify the results of other commands. The other command to learn about is Select-Object. If you don't include that, you may not see all of the available properties. Note that the asterisk (*) after the Format-List command is important to include. ![]() You can use the result of that command to help you build your filter. The "Format-List *" command will output all properties and their values of the object passed in on the pipeline. For example, we can find out all of the properties of Windows services by running: If you don't know what properties an object contains, or you need some examples of values, you can use the Format-List command to list out the entire object. In each of the above examples, we filtered our results using the names of properties that we already knew. Where-Object | Stop-Service Getting Property Names Where-Object follows a consistent pattern that looks like: The Where-Object command is used to filter objects based on any of their properties. With no filtering in place, this would attempt to stop all of the running processes on the system. If you pipe Get-Process to Stop-Process, as in Get-Process | Stop-Process, the processes selected by the Get-Process command will be stopped. When doing so, you are passing the results of the commands on the left of the pipe into the commands on the right of it. Additionally, PowerShell commands can be chained together with the Pipe character: |. Each of these are stored as properties within a Process object. For example, the Get-Process command will return multiple separate pieces of information about running Windows processes, such as the EXE path, start time, and current memory usage. Nearly every command will output an object with multiple properties that can be viewed and filtered on individually. To learn how to use the Where-Object and Select-Object commands, it's important to understand the concepts we covered in past articles. Review of PowerShell Objects and the Pipeline ![]() ![]() Using these commands allows you to precisely define what items are displayed or acted on. The next topic in the PowerShell Basics series is focused on filtering and selecting PowerShell objects using the Where-Object and Select-Object commands.
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