PowerShell is an automation engine and scripting language that provides a shell environment and replaces CMD in Windows. It allows for variables, arrays, hashes, functions, classes, and cmdlets to be used for automation tasks and connecting commands through piping. PowerShell provides access to WMI, COM objects, .NET assemblies, and acts as a shell with aliases and drives that can be used to manage systems, filter and group command output, and write deployment scripts.

1. Introduction to PowerShell Ivan Suhinin Senior Software Engineer

2. What is PowerShell? Automation engine Shell environment Scripting language

3. PowerShell as a shell A full replacement for CMD At last something bash-like in Windows Just… feel the power!

4. PowerShell as a language Variables: $a, $name Arrays: $arr = 1,2,3,4,5,6; $sarr=1..6 Hashes: $h = @{“Key1" = 23; “Key2" = 894} Functions: function hi ($name) { echo "Hi, $name!" } Classes:($o = New-Object Object) |Add-Member NoteProperty Name “Bianco"

5. PowerShell as an automation tool Predefined set of commands with lots of extensions Easy batch operations Simple command interconnections (pipelining)

6. Command types Cmdlets – Get-Location Functions User scripts - *.ps1 Native applications (msbuild, csc)

7. Cmdlets Predefined set of commands Form: Verb-Noun: Get-Location Get-ChildItem Set-Location Long, descriptive names for scripts Aliases for daily usage

8. Aliases Creating short names for long cmdlets Get-Alias, Set-Alias Makes scripting more friendly By default has standard UNIX aliases ls, ps, pwd, date, kill, gal, pushd, popd

9. Wiring commands up Pipelining: Get-Location | Get-Member Functional style .NET objects instead of strings (bash) Output becomes input Select – selecting only needed information Where – filtering results Group – grouping results ForEach – processing each input value

10. PowerShell providers Adapters to different subsystems Get-PSProvider, Get-PSDrive Default: WSMan, Alias, Environment, FileSystem, Registry Extended: IIS, SQL, SharePoint, VMWare

11. Using external components Windows Management Instrumentation (WMI) gwmi win32_service gwmi win32_operatingsystem COM (New-Object -ComObjectWScript.Shell).Run("calc.exe")

12. Using .NET Importing assemblies:[Reflection.Assembly]::LoadWithPartialName("System.Messaging") Calling static methods:[System.Messaging.MessageQueue]::GetPrivateQueuesByMachine("localhost") Creating and using objects:$b = New-Object System.Text.StringBuilder$b.Append("Hello!")

13. man Ultimate help system Examples Detailed Full

14. Demo: deleting MSMQ queues

15. Demo: sorting SQL tables by size

16. Demo: real-life deployment script

17. Development environment Autocompletion Tab key Wildcards Works for methods PowerShell ISE PowerGUI

18. Q & A