PowerShell for Admins

1
PowerShell for Admins
http//bp0.blogger.com/_O4XKqIP_aWE/Rsq24YoLl4I/AA
AAAAAAALo/oumPQqLvCnI/s1600-h/PowerShell.jpg

• IgorShare Consulting (www.igorshare.com/blog)
• Presenter Igor
  Moochnick

2
What is PowerShell?

• New Command Prompt?
• No it is a prompt to .NET framework and
  scripting engine for your applications
• Commands emit objects (Object piping) great
  feature
• Bunch of tutorials - http//www.powershellpro.com/
  powershell-tutorial-introduction/powershell-functi
  ons-filters/

3
Discovering PowerShell

• PowerShell provides a discoverable environment.
  If you dont know something or do not remember
  browse around
• Most of the commands support wildcards

Get-Help (help) Get-Command (gcm) Get-PSDrive
(gdr) Get-Member (gm)
PS C\gt get-command snapin
4
Commands, functions and scripts

• Create and execute scripts and functions

Function Add (intx 0, inty 0)
    write-host (x y) PS C\gt Add 10 212
5
Calling into .NET framework

• Use .NET types in your scripts
• Call into .NET directly

PS C\gt echo (DateTimeNow)
PS C\gt System.Reflection.Assembly
LoadWithPartialName("System.Windows.Forms"
) PS C\gt System.Windows.Forms.MessageBoxShow(
"Hello)
6
Cmdlet Demo

• Code
• build class library
• Registration
• Installutil ltsnapin.dllgt
• Add-PSSnapin ltSnapinNamegt
• Save settings
• Export-console consoleSnapshot
• Execution
• Debugging
• PowerShell PSConsoleFile consoleSnapshot.psc1

7
Cmdlets

• PSSnapin (subclass)
• Default registers all Cmdlets
• CustomPSSnapin register specific Cmdlets
• Parameters and Parameter Sets
• Begin/End/StopProcessing
• ProcessRecord
• WriteObject and WriteError

8
Pipeline object flow
Input
Output
Cmdlet 1
Cmdlet 2
0
1
2
3
ProcessRecord Call
4
5
Object Injection
6
Object Replacement
7
8
9
Object Cancelation
9
Advanced Scripting (PoSH 2.0)
function Get-Total ( Stringproperty (throw
"Property Required"), stringformatString
"Total 1 0" ) Begin total
0 Process total
_.property End formatString
-f total,property
10
Debugging in PowerShell

• Debugging and Tracing
• Debug
• Verbose
• Error Handling
• ErrorAction
• ErrorVariable
• Conditional
• Whatif
• Confirm
• Pipelines
• Output your data to a file or other command

11
Providers (and Drives)

• Types of providers
• Basic provider
• Drive provider
• Item provider
• Container provider
• Navigation provider
• Content provider
• Property provider

• Default providers
• Alias
• Certificate
• Environment
• FileSystem
• Function
• Providers
• Registry
• Variable

12
PASH PoSH bash(http//pash.sourceforge.net)

• Announcement of PowerShell open source
  reimplementation
• public project

13
Pash PowerShell everywhere
14
Conclusion

• Think outside of the BOX !!!

15
Helpful Links

• Windows PowerShell Team blog http//blogs.msdn.com
  /PowerShell
• Windows PowerShell ScriptCenterhttp//www.microso
  ft.com/technet/scriptcenter/hubs/msh.mspx
• Pash - Public Projecthttp//pash.sourceforge.net
• E-mail igor_at_igorshare.com
• Blog http//igorshare.wordpress.com/
• Home Page http//www.igorshare.com/

16
Blogroll

• Live PowerShell With Karl Prosser
  (http//karlprosser.com/coder/)
• The PowerShell Guy (http//thepowershellguy.com/)
• Creating a Windows PowerShell CmdLet using the
  Visual Studio Windows PowerShell Templates
  (http//blogs.msdn.com/daiken/archive/2007/02/07/c
  reating-a-windows-powershell-cmdlet-using-the-visu
  al-studio-windows-powershell-templates.aspx)
• PowerTab from The PowerShell Guy
  (http//thepowershellguy.com/blogs/posh/pages/powe
  rtab.aspx)