Getting Started With PowerShell Scripting

Email: [email protected]: @RavikanthBlog: http://www.ravichaganti.com

Getting started with PowerShell Scripting

Ravikanth C

http://bitpro.in/


A lead engineer at Dell SharePoint professional by day and

PowerShell scripter at night Blog at http://www.ravichaganti.com/blog Developer of

◦ PSCodePlex◦ PSRemoteFileExplorer◦ Remote File Explorer PowerPack◦ BITS File Transfer PowerPack

Author of◦ Free eBook - Layman’s guide to PowerShell 2.0

remoting (Coming soon)

About me

http://www.ravichaganti.com/blog

http://www.ravichaganti.com/blog


What is PowerShell? Getting started Using PowerShell Getting Help Tools for the job Learning resources Q & A

Agenda


Remote file explorer -> 698 lines of PowerShell

This is just one example..!

Show me the Power first.!


The best shell scripting environment for Windows◦ A new scripting language◦ Replacement for a weak Windows command-line

Default management / automation platform for all Microsoft products going forward

Object based◦ Built on top of .NET type system◦ Everything is an object

What is PowerShell?

DOS Batch PowerShell@echo off setLocal EnableDelayedExpansion set /a value=0 set /a sum=0 FOR /R %1 %%I IN (*) DO ( set /a value=%%~zI/1024 set /a sum=!sum!+!value! ) @echo Size is: !sum! k

$size=0;Get-ChildItem C:\Scripts | % { $Size+=$_.Length}


PowerShell is in version 2.0 Default on Windows 7 and Windows Server

2008 Part of Windows management framework

download for Windows Server 2008, Vista, XP and Windows 2003◦ http://support.microsoft.com/kb/968929

Requires .NET 2.0 SP1 or later

Getting started

http://support.microsoft.com/kb/968929


Console history, Intellisense for cmdlets, variables and parameters

Using PowerShell: Console


Using PowerShell: ISE


Using PowerShell: Cmdlets

Pronounced as command-let A lightweight command

an instance of .NET framework classes Use verb-noun pairs

◦ Get-Verb to list all approved verbs


Not case-sensitive Default value is $null Cmdlets to manage variables

◦ Clear-Variable◦ Get-Variable◦ New-Variable◦ Remove-Variable◦ Set-Variable

Using PowerShell: Variables


Types◦ User created variables◦ Automatic variables

Created by PowerShell to maintain its state Cannot be modified Examples: $PSHome, $$, $^, $?, etc

◦ Preference variables Created by PowerShell to store user preferences Can be modified Examples: $MaximumHistoryCount, etc

Using PowerShell: Variables


Alternate names for cmdlets Cmdlets to manage aliases

◦ Export-Alias◦ Get-Alias◦ Import-Alias◦ New-Alias◦ Set-Alias

Cannot take parameters◦ Workaround: put the statement in a script and

alias to that Example: Dir, ls, gcm, gci, etc

Using PowerShell: Aliases


Conditional statements◦ If◦ Switch

l.ooping◦ For

For ($i=0;$i –le 10;$i++) {Write-Host $i}◦ Foreach

Used on a collection of items Foreach ($name in $namesArray) { Write-Host $name }

◦ Do Do { Write-Host $i; $i++ } while ($i –le 10) Do { Write-Host $i;$i++} Until ($i –lt 10)

◦ While While ($i –le 10) { Write-Host $i;$i++ }

Using PowerShell: Conditional & Looping


Comparison operators◦ -ne, -eq, -lt, -gt, -ge, -le, -like, -notlike, -contains, -

notcontains, -match, -notmatch Logical operators

◦ -or, -and, -xor, -not, ! Arithmetic operators Assignment operators

Using PowerShell: Operators


Arrays◦ Collection of objects of the same type◦ $a = @( )◦ $a = “PowerShell”,”VBScript”

Hash Tables◦ Collection of key value pairs◦ $ hash = @{ }◦ $a = {“Name”=“PowerShell”; “IsHot”=$true}

Using PowerShell: Arrays & Hash Tables


Getting Help Get-Command

◦ Gets a list of all commands Get-Help

◦ Shows help for a given cmdlet Get-Member

◦ Gets members of an object Get-PSDrive

◦ Shows information stores in PowerShell About_Topics

◦ Get-Help about*


In PowerShell, there will be more than one way to do the same thing. For example◦ [System.Diagnostics.Process]::GetProcesses()◦ Get-Process

Understand execution policies Use PowerShell profiles

Best practices


PowerShell Console PowerShell ISE PowerGUI AdminConsole PowerGUI ScriptEditor PowerWF PowerShell Plus

Tools for the job


Getting started guide PowerShell Learning center Free PowerShell eBook The scripting Guys blog PowerScripting Podcast @PSBUG on Twitter

Learning resources

http://msdn.microsoft.com/en-us/library/aa973757(VS.85).aspx

http://technet.microsoft.com/en-us/scriptcenter/dd742419.aspx

http://powershell.com/cs/blogs/ebook/default.aspx

http://blogs.technet.com/heyscriptingguy/default.aspx

http://powerscripting.wordpress.com/

http://www.twitter.com/psbug

Getting Started With PowerShell Scripting

Technology

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