PowerShell v2 Day 3

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Day 3

Powershell ISE default file encoding will not let you sign scripts.

$psISE

$psISE.CurrentFile | fl *

$psise.CurrentPowerShellTab.AddOnsMenu

http://www.dougfinke.com/blog/index.php/2009/07/08/six-important-menu-add-ons-for-powershells-ise/

Modules

$env:PSModulePath

Get-Module -ListAvailable

Import-Module -Prefix BT BitsTransfer #add a prefix to avoid name collision if necessary

script variables

$PSScriptRoot

Windows Remoting

Windows remoting stuff

create new sessions and use them interactively

winrs -r:servername cmd.exe

Enter-PSSession -ComputerName server01

create a persistant session

$s = New-PSSession server01

Enter-PSSession -Session $s

exit

Remove-PSSession $s

Invoke-Command -ComputerName server01,server02,server22 -ScriptBlock { Get-Process }

modify pssession config security

Set-PSSessionConfiguration microsoft.powershell -ShowSecurityDescriptorUI

$job = Start-Job -ScriptBlock { gci c:\ -Recurse}

Receive-Job -Job $job -Keep

$job | gm -MemberType event

Get all cmdlets with the -asJob parameter

Get-Command -CommandType cmdlet | Where-Object { $_.Parameters.Keys -contains "AsJob"}

Get folder size

http://technet.microsoft.com/en-us/library/ff730945.aspx

Get-DiskUsage.psm1

Errors

$error

$error[0] # most recent error in stack

$error.clear()

$ErrorActionPreference

Get-Variable *preference*

Get-ChildItem HKLM:

$ErrorActionPreference = "SilentlyContinue"

Get-ChildItem HKLM:

$ErrorActionPreference = "Continue"

Get-ChildItem HKLM: -ErrorAction SilentlyContinue

Get-ChildItem HKLM: -ErrorVariable $gcierror

$Error[0]

$Error[0] | fl *

$Error[0] | fl * -Force

$Error[0].Exception.message

$Error[0].Exception.message | gm

write-error

throw #terminatingerror

$? returns true if the last command had no errors

$? returns false if the last command had any errors

$LASTEXITCODE # for external application

cmd

net stop winmgmt && net start winmgmt

powrshell

net stop winmgmt if ($?) {net start winmgmt}

Trace-Command { Get-Process explorer } -Name ParameterBinding -Option All -PSHost

Get-TraceSource

Debugging

Set-PSBreakpoint -Script file.ps1 -Line 3

Get-Variable -Scope 0

? # get commands in debug mode

Set-PSBreakpoint -varibale var -mode ReadWrite

Set-PSBreakpoint -command get-process

old v1 way of doing this was to include $host.EnterNestedPrompt() in your script

$host.EnterNestedPrompt()

[Enum]::GetNames("System.ConsoleColor")

[Console]::Beep()

Set-StrictMode

Set-PSDebug -Strict

WMI

__This is the same as $_

ISA is the same as -is

Get-WmiObject -Query "Select * from Meta_Class where __THIS ISA '__EVENT'"

[AppDomain]::CurrentDomain.GetAssemblies()

Add-Type -AssemblyName "System.Windows.Forms"

[System.Windows.Forms.MessageBox]::Show("Hello", "Caption", "YesNoCancel")

[AppDomain]::CurrentDomain.GetAssemblies()