Module 03-Lesson 1.1: Working with Windows PowerShell pipeline | What is Pipeline?

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PowerShell Scripting For Beginners || Module 3: Working with the Windows PowerShell pipeline || Lesson 1: Understanding the pipeline ||

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In this video i will be covering the following topics:

1. What is the pipeline?
[] A pipeline is a chain of one or more commands in which the output from one command can pass as input to the next command
[] Even a single command runs in a pipeline
[] In Windows PowerShell, each command in the pipeline runs in sequence from left to right. For multiple commands, each command and its parameters are separated from the next command by a character known as a pipe (|)
[] When running multiple commands as part of a single pipeline, you most commonly see the verbs Get and Set used in combination
[] You use the output of a Get-* command as the input for a Set-* command. You often use these commands in combination with a filtering command, such as Where or Select. In that case, the output of Get-* is filtered by the Where or Select command before being piped to the Set-* command.

2. Pipeline output
[] Windows PowerShell commands do not generate text as output. Instead, they generate objects. Object is a generic word that describes an in-memory data structure
[] You can imagine command output as looking like a database table or a spreadsheet. In Windows PowerShell terminology, the table or spreadsheet consists of a collection of objects, or just a collection for short. Each row is a single object, and each column is a property of that object—that is, information about the object. For example, when you run the Get-Service command, it returns a collection of service objects. Each object has properties with names such as Name, DisplayName, and Status.

3. Discovering object members
[] Members are the various components of an object and include:
* Properties. Describe attributes of the object. Examples of properties include a service name, a process ID number, and an event log message.
* Methods. Tell an object to perform an action. For example, a process object can quit itself, and an event log can clear itself.
* Events. Trigger when something happens to an object. A file might trigger an event when it opens, or a process might trigger an event when it has output to produce.
[] Note: Get-Member has an alias: gm.
[] To use Get-Member, just pipe any command output to it. For example, type the following command in the console, and then press Enter:
[] Get-Service | Get-Member

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Links to the previous videos:

1. Introduction to Windows PowerShell
2. Overview and Background of Windows PowerShell
3. Lab A: Configuring Windows PowerShell
4. Understanding command syntax & Finding commands
5. Lab B: Finding and running basic commands
6. Active Directory administration cmdlets
7. Network configuration cmdlets & Other server administration cmdlets
8. Windows administration

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