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  • Checking Windows Updates

    To check all installed updates on a Windows box, there is a COM library you can use. Unfortunately, this library isn't very intuitive to use, nor does it work remotely. So here is a PowerShell function called Get-WindowsUpdate. It gets the locally...
  • Finding AD Accounts Easily

    All PowerShell versions You do not necessarily need additional cmdlets to search for user accounts or computers in your Active Directory. Provided you are logged on to the domain, simply use this: $ldap = ' (&(objectClass=computer)(samAccountName...
  • Identifying Network Vendors by MAC Address

    All PowerShell Versions Each MAC address uniquely identifies a network device. The MAC address is assigned by a network equipment vendor. So you can backtrack the vendor from any MAC address. All you need is the official IEEE vendor list which is more...
  • Wait For Key Press

    Sometimes you'd like to wait for a key press. The easiest way is to use Read-Host like this: Read-Host 'Please press ENTER' | Out-Null Problem here is: Read-Host accepts more than one key and only continues after you press ENTER. To implement...
  • ExpandProperty rocks - sometimes

    Select-Object will select the object properties that you want to see. So it removes all properties you did not specify, but it always returns an object: Get-Process | Select-Object Name Often, you are not interested in an object but prefer the content...
  • Using OpenFile Dialog

    You can use this code to open a standard OpenFile dialog in your PowerShell scripts: [ System.Reflection.Assembly ]:: LoadWithPartialName ( "System.windows.forms" ) | Out-Null $dialog = New-Object System.Windows.Forms.OpenFileDialog $dialog...
  • Creating Calendars (and Lists of Dates)

    Here's a code snippet that creates DateTime ranges. Just specify a year and a month, and the script produces a DateTime object for each day in that month: $month = 8 $year = 2013 1 .. [ DateTime ] :: DaysInMonth ( $year , $month ) | ForEach-Object...
  • Getting Excuses Automatically

    Tired of inventing lame excuses yourself? Then here's a script that gets you a new excuse any time you call Get-Excuse! All you need is Internet access: function Get-Excuse { $url = ' http://pages.cs.wisc.edu/~ballard/bofh/bofhserver.pl '...
  • Pinging Computers

    There are multiple ways how you can ping computers. Here is a simple approach that uses the traditional ping.exe but can be easily integrated into your scripts: function Test-Ping { param ([ Parameter ( ValueFromPipeline = $true )] $Name ) process { ...
  • Getting Yesterday’s Date - at Midnight!

    Getting relative dates (like yesterday or one week ahead) is easy once you know the Add…() methods every DateTime object supports. This would give you yesterday: $today = Get-Date $yesterday = $today . AddDays ( - 1 ) $yesterday $yesterday will...
  • Starting Services Remotely

    Since Start-Service has no -ComputerName parameter, you cannot use it easily to remotely start a service. While you could run Start-Service within a PowerShell remoting session, an easier way may sometimes be Set-Service. This would start the Spooler...
  • Finding Active Directory User Accounts Fast

    The more specific your LDAP query is the faster and less resource intense the query is, and the more precise are the results as well. For example, most people use objectClass to limit search results to a specific object class. To find just user accounts...
  • gpupdate on Remote Machines

    To run gpupdate.exe remotely, you could use a script like this: function Start-GPUpdate { param ( [ String []] $ComputerName ) $code = { $rv = 1 | Select-Object -Property ComputerName , ExitCode $null = gpupdate.exe /force $rv . Exitcode = $LASTEXITCODE...
  • Showing WPF Info Message

    WPF (Windows Presentation Foundation) is a technology that enables you to create windows and dialogs. The advantage of WPF is that the window design can be separated from program code. Here is a sample that displays a catchy message. The message is defined...
  • Exporting and Importing Credentials in PowerShell

    Credential objects contain a username and a password. You can create them using Get-Credential, and then supply this object to any cmdlet that has the -Credential parameter. However, what do you do if you want your scripts to run without user intervention...
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