Powershell Snippets

export-ou.ps1

# Get all of the OUs in an existing domain and export them to cli-xml
# The path is added to each OU object so that they will be placed properly
# by the New-ADOrganizationalUnit command

Get-ADOrganizationalUnit -Filter * -Properties * |
select *, @{Name="Path";Expression={$_.DistinguishedName -replace "^.*?\,",""}} |
Export-Clixml .\prodOUs.xml

Get-Ec2InstanceDetails

Get-EC2Instance | Select-Object -ExpandProperty instances | Select-Object InstanceId, @{Name='Name'; Expression={$_.Tags | Where-Object { $_.Key -like 'Name'} | Select-Object -ExpandProperty Value }}, InstanceType, @{Name='AMI'; Expression={Get-EC2Image -ImageId $_.ImageID | Select-Object -ExpandProperty name}}, @{Name='StorageConfig'; Expression={"Storage"}}, @{Name='SubnetName'; Expression={Get-Ec2Subnet -SubnetId $_.SubnetId | Select-Object -ExpandProperty Tags | Where-Object { $_.Key -like 'Name' } | Select-Object -ExpandProperty Value }} | Sort-Object -Property Name | Out-GridView

get-filteredparameter.ps1

filter Get-FilteredParameter
{
    param
    (
        $ExcludedParameters,
        [Switch]$ExcludeCommonParameters,
        [Switch]$ExcludeOptionalCommonParameters
    )

    begin
    {
        $commonParameters = 
            [System.Management.Automation.Cmdlet]::CommonParameters
        $optionalCommonParameters = 
            [System.Management.Automation.Cmdlet]::OptionalCommonParameters

        $filteredParameters = $()
        $filteredParameters += $ExcludedParameters
        
        If ($ExcludeCommonParameters)
        {
            $filteredParameters += $commonParameters
        }
        If ($ExcludeOptionalCommonParameters)
        {
            $filteredParameters += $optionalCommonParameters
        }
    }
    
    process
    {
        If ($filteredParameters -notcontains $_.Key) { $_ }
    }
}

get-freespace.ps1

function Get-FreeSpace
{
    param ( $ComputerName='localhost' )

    $wmiParams =
    @{
        'Class' = 'Win32_LogicalDisk';
        'ComputerName' = $ComputerName;
    }

    $sizeProperty =
    @{
        'Name' = 'GB Free';
        'Expression' = {($_.FreeSpace / 1Gb).ToString("#.##")}
    }

    Get-WmiObject @wmiParams | select Name,Size,$sizeProperty
}

get-localuser.ps1

function Get-LocalUser ($Computername = $env:COMPUTERNAME) {
    
    $params = 
    @{
        'Class' = 'Win32_UserAccount';
        'Filter' = 'LocalAccount=True';
        'ComputerName' = $ComputerName;
    }
    
    Get-WmiObject @params
}

get-nondefaultvpcs.ps1

Get-AWSRegion `
| ForEach-Object `
{
  $_.Region;
  $noDefaultFilter = [Amazon.EC2.Model.Filter]@{Name = 'isDefault'; Values = 'false' }
  Get-EC2Vpc -Region $_.Region -Filter $noDefaultFilter
}

import-gpo.ps1

# After backing up GPOs with Backup-GPO -All -Path $destPath
# the GPOs can be imported to another domain with the following
# snippet

cd $pathToBackedUpGPOs

ls |
% {
    $gpoName = $(gc "$_\bkupInfo.xml" |
                 Select-Xml "//*[name()='GPODisplayName'] " |
                 % {$_.Node.InnerText})

    $params = 
    @{
        'BackupId'=$_.Name;
        'Path'=$PWD;
        'TargetName'=$gpoName;
        'CreateIfNeeded'=$True;
    }

    Import-GPO @params
}

Powershell Snippets.md

This is a collection of Powershell snippets that I'll add to when I find something useful.