VM_Locator/Notes.md

Powershell

Data storing

Variable

$x="Text"

Invoking / Data types

String

[string]$x="Text"

Int

PS C:\Windows\system32> [int]$x=1
PS C:\Windows\system32> [int]$x="1"
PS C:\Windows\system32> [int]$x="1a"
Cannot convert value "1a" to type "System.Int32". Error: "Input string was not in a correct format."
At line:1 char:1
+ [int]$x="1a"
+ ~~~~~~~~~~~~
    + CategoryInfo          : MetadataError: (:) [], ArgumentTransformationMetadataException
    + FullyQualifiedErrorId : RuntimeException

Bool

(MS Documentation)[https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_booleans?view=powershell-7.2]

Array

$arry = @("a", "b", "c")

Hash Table / Dictionary

MS documentation

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-powershell-1.0/ee692803(v=technet.10)?redirectedfrom=MSDN

[ordered]@{ <name> = <value>; [<name> = <value> ] ...}

(By default sorts by values, I believe ordered means the array trust you as the elements are ordered.)

$X = [ordered]@{A=1;C=2;B=3}

Call a single elemnt from the array

Normal Array

@("a", "b", "c")[0]
>> a

@("a", "b", "c")[-1 ]
>> c

Hash array

@{A=1;C=3;B=2}["A"]
>> 1

User Interaction

Output

Write-Host

Also accepts from redirection

Write-Host
     [[-Object] <Object>]
     [-NoNewline]
     [-Separator <Object>]
     [-ForegroundColor <ConsoleColor>]
     [-BackgroundColor <ConsoleColor>]
     [<CommonParameters>]

Write-Host "text"

Write-Output

Write-Output "text"

Filtering

Write-Output "text" | Select-String -pattern $filters -notMatch

Select-Object

Select-Object HostName

File interactions

Read file

Get-Content $path

write to file

Write-Host $text | Out-File $path

Operators

Check if last command executed correctly

# Do something
echo $?

Looping

For

For each

(MS Documentation)[https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/foreach-object?view=powershell-7.2]

Management

Access remote PS server

Enter-PSSession –ComputerName $hostname [-Credential username]

If username gets left behind, the current user will be used

Send command remotely

Invoke-Command -ComputerName hostname1, hostname2 -ScroptBlock {$COMMAND}

Text formatting

?

https://devblogs.microsoft.com/scripting/understanding-powershell-and-basic-string-formatting/

https://adamtheautomator.com/hyper-v-powershell/

Objects

Functions

Classes

https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_classes?view=powershell-7.2

https://livebook.manning.com/book/windows-powershell-in-action-third-edition/chapter-19/64

https://xainey.github.io/2016/powershell-classes-and-concepts/#introduction

Hypver-V specific

Management

Create new host

New-VM -Name "HYPER" -MemoryStartupBytes 512MB

List current VM

Get-VMHost
    [[-ComputerName] <String[]>]
    [[-Credential] <PSCredential[]>]
    [<CommonParameters>]

Example

Find VM by name

Get-VM -ComputerName Server1

VMWARE

Connect-VIServer

Connect-VIServer