Get-PSProvider

Get-PSDrive

Get-PSDrive -PSProvider registry
Get-PSDrive -PSProvider environment
Get-Command *-psdrive

Get-Help New-PSDrive -full | more

New-PSDrive

New-PSDrive -Name system32 -PSProvider filesystem -root ($env:windir + "\system32") -Description "Custom Drive"
cd system32:
$pwd.Path
dir function:c: | fl *
Remove-PSDrive system32

Set-Location cert:
cd cert:\CurrentUser\AuthRoot
gci | where {$_.subject -like "*c&w*"}
gci | where {$_.subject -like "*c&w*"} | Select-Object subject, thumbprint

Set-Location env:
dir
gci
dir | sort name
Get-Item windir
Get-Item windir | Format-List *
(Get-Item windir).value                    #same as line below
$env:windir                                #same as line above

Create a new envirnment variable

New-Item -path . -name admin -value mred 
Rename-Item -path env:\admin -newname super
Remove-Item super

Update environment variable

Set-Location env:
Set-Item Path ($env:path + ";c:\temp")
Set-Item env:\Path ($env:path + ";c:\temp") #same as line below
$env:path =  $env:path + ";c:\temp1"        #same as line above
dir env:\path
get-item env:\path

Arrays

$iary = 1..25

$iary 

2

3

$iary[11]

12

$iary[11] = "The Middle"
$iary[11] 

 The Middle

Get the number you would use next to add a new item to the array

$iary[$iary.GetUpperBound(0)]
$iary[$iary.count -1] 
$iary[-1]

25

$iary[1,2,3,15]
$iary[1,2,3,15,-1,-2]

$iary[1,2,3,15,-1,-2, 10..14]   # Fails
$iary[1,2,3,15,-1,-2 + 10..14]

$iary += "The End"

$iary[0] = $null

$ary =@()
$ary.gettype()

$ary += "first"
$ary += "second"
$ary += "third"

$ary = New-Object "system.object[]" 5
$ary.GetUpperBound(0)
$ary.Count
$ary

Shift Array

 $a = 1,2,3,4,5
 $first, $rest = $a

multidimensional array

$2d = New-Object "system.object[,]" 5,10
$2d.rank
$2d[0,1] = "First value second dimension"
$2d
$2d[0,1]

variables

$newimplicitvarible = "blah"
New-Variable snewExplicitvariable
set-variable snewExplicitvariable -value "mred" 

$var 

Force declaration of variables

set-psdebug -strict:$True
$var                            #will now fai

set-psdebug -strict:$False

Strongly type a variable

[int]$a = 1
$a.GetType()
IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     Int32                                    System.ValueType

[string]$a = "Hello World"
$a.GetType()

Constant

Set-variable -name intDriveType -value 3 -option constant #constant for local disk

Read-only

New-Variable

Scope

Global

local

scriptlocal

numericlocal in nested

$Global:variablename = "blah"

function global:test
{
}

Execution Policy

1. restricted (default)
2. AllSigned
3. RemoteSigned
4. Unrestricted
   

get-command -noun ExecutionPolicy
Get-ExecutionPolicy
Set-ExecutionPolicy Unrestricted

Get-Command *authenticode*

notepad c:\filename.ps1:zone.identifier

Pass Parameters to a script

testparameters.ps1

PARAM ($server=".",$ns="root\cimv2")

Write-Host "server: " $server
Write-Host "Name Space: " $ns

server:  foo
Name Space:  root\cimv2 

Get-Host

(get-host).currentculture.DateTimeFormat | format-list -property *
(get-host).ui.rawui | format-list -property *
(get-host).ui.rawui.backgroundcolor = "Black"