More info on http://techdays.be.

1. The Power Of PowerShell: Advanced
Kurt Roggen, Technical Consultant,
Devoteam
kurt.roggen@devoteam.be

2. Agenda
• PowerShell Basics
• PS Syntax
• Pipeline
• 3 cmdlets to know/remember
• PowerShell Advanced
• Functions
• Modules
• Comment Based Help
• Accepting PS Objects from the pipeline
• Creating PS Objects

4. PS Cmdlet Syntax
verb-<ID>SingularNoun
Get-Service, New-Mailbox, Get-ADUser, Get-Disk, Get-VM,
Start-Process, Stop-Process, New-NALun, Get-AzureVM, ...

5. 3 cmdlets to know/remember!!
PowerShell is self-discoverable using
1. Get-Command
2. Get-Help
3. Get-Member

6. 1. Get-Help
Displays help information
Get-Help
Get-Help get-service
Get-Help get-service -examples
Get-Help get-service -detailed
Get-Help get-service -full
Get-Help get-service -online
Get-Help get-service -parameter ComputerName
Get-Help * -parameter ComputerName
Get-Help about_wildcards
Alias: help

7. 2. Get-Command
Displays all commands (cmdlet, function, alias)
Get-Command
Get-Command -verb get
Get-Command -noun service
Get-Command -module ActiveDirectory
Get-Command -CmdType cmdlet
Alias: gcm

8. 3. Get-Member
Displays all MemberTypes (Property,Methods,...)
Get-Service | Get-Member
Get-Member –InputType (Get-Service)
Get-Member –MemberType Method
Get-Member –MemberType Property
Alias: gm

9. Modules

10. Modules
Collections of cmdlets
Portable
Stored in file system
%windir%System32WindowsPoweshell1.0Modules
Module Cmdlets:
New-Module, Get-Module, Import-Module, Remove-Module
Module Manifest Cmdlets:
New-ModuleManifest , Test-ModuleManifest

11. Functions

12. Creating Functions
function Get-OS
{
param(
[string[]]$ComputerName = $env:COMPUTERNAME
)
gwmi Win32_OperatingSystem -ComputerName $ComputerName
}
PS C:> Get-OS -ComputerName “MyClient1”, ”MyClient2”

13. Creating Modules
Modules Location:
%windir%System32WindowsPoweshell1.0Modules
Create a PS module folder (eg: MyModule)
Save PS module with extension .PSM1 instead of .PS1 (MyModule.psm1)
• PS module folder name must have same name as PS module file basename

14. Comment Based Help

15. Comment Based Help
Function Get-OS
{
<#
.SYNOPSIS
<toktok>
.DESCRIPTION
<toktok>
.PARAMETER ComputerName
<toktok>
.EXAMPLE
Get-OS
.LINK
http://mysite.com/get-os/
#>
Param (
[string]$ComputerName,
[switch]$Details
)
}

16. Accepting Pipeline Input

17. Accepting Pipeline Input
function Get-OS
{
param(
[Parameter(ValueFromPipeLine=$true)]
[string[]]$ComputerName = $env:COMPUTERNAME
)
PROCESS
{
<blabla>
}
}

18. Creating PS Objects

19. Create PS Object
$Obj = New-Object –Type PSObject
$Obj | Add-Member –Name ComputerName –Value $ComputerName –Type NoteProperty
$Obj | Add-Member –Name OS –Value $OS –Type NoteProperty
$Obj | Add-Member –Name ServicePack –Value $ServicePack –Type NoteProperty
$Obj | Add-Member –Name Version –Value $ComputerName –Type NoteProperty
Return PS Object (to pipeline)
$Obj

20. Conclusion
PowerShell is the future present
PowerShell is Self-discoverable
 Remember 3 basic commands
Reuse code using functions in modules
It’s easy - Try it, you’ll see!