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Overview of Powershell

This unit discuss about only the overview of Windows Powershell

Overview of Powershell

The Unit discuss about Windows Powershell Introduction and Overview

Windows PowerShell promises to revolutionize the world of system management and command-line shells. From its object-based pipelines to its administrator focus to its enormous reach into other Microsoft management technologies, PowerShell drastically improves the productivity of administrators and power users alike.

When you’re learning a new technology, it is natural to feel bewildered at first by all the unfamiliar features and functionality. This perhaps rings especially true for users new to Windows PowerShell because it may be their first experience with a fully featured command-line shell. Or worse, they’ve heard stories of PowerShell’s fantastic integrated scripting capabilities and fear being forced into a world of programming that they’ve actively avoided until now.

Fortunately, these fears are entirely misguided; PowerShell is a shell that both grows with you and grows on you. Let’s take a tour to see what it is capable of:

  • PowerShell works with standard Windows commands and applications. You don’t have to throw away what you already know and use
  • PowerShell introduces a powerful new type of command. PowerShell commands (called cmdlets) share a common Verb-Noun syntax and offer many usability im‐provements over standard commands.
  • PowerShell understands objects. Working directly with richly structured objects makes working with (and combining) PowerShell commands immensely easier than working in the plain-text world of traditional shells.
  • PowerShell caters to administrators. Even with all its advances, PowerShell focuses strongly on its use as an interactive shell: the experience of entering commands in a running PowerShell application.
  • PowerShell supports discovery. Using three simple commands, you can learn and discover almost anything PowerShell has to offer.
  • PowerShell enables ubiquitous scripting. With a fully fledged scripting language that works directly from the command line, PowerShell lets you automate tasks with ease.
  • PowerShell bridges many technologies. By letting you work with .NET, COM, WMI, XML, and Active Directory, PowerShell makes working with these previously isolated technologies easier than ever before.
  • PowerShell simplifies management of data stores. Through its provider model, PowerShell lets you manage data stores using the same techniques you already use to manage files and folders.

PowerShell was released in 2006 and is installed by default starting with Windows 7 and Server 2008R2. PowerShell is also available as a download for Windows XP, Windows Vista, and Server 2003. One of the main differences between PowerShell and VBScript/JScript, the other primary scripting languages for Windows, is that PowerShell provides an interactive runtime. This runtime
allows a user to execute commands in real time, and then save these commands as scripts,
functions, or modules to be used later.

Since its introduction, support for PowerShell has increased dramatically. In addition to managing Windows environments, Microsoft quickly created snap-ins for additional applications such as Exchange Server, the System Center suite, and clustering. Additional vendors have also created snap-ins for PowerShell, with some of the most popular being VMware and NetApp.

Windows PowerShell’s main functionality is provided by commands. These come in varieties:

  • cmdlets (pronounced “command-lets”)
  • Functions
  • Workflows, and more. These commands are building blocks, designed to be pieced together to implement complex and customized processes and procedures.
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