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  • Reading Registry Values with Type

    All PowerShell Versions Reading all registry values is simple when you do not need the data type: simply use Get-ItemProperty: Get-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run If you do need the data type, a little more effort...
  • Finding Files plus Errors

    All PowerShell Versions When you use Get-ChildItem to recursively search directory paths for files, you may stumble across subfolders where you do not have enough privileges. To suppress errors, you may use –ErrorAction SilentlyContinue. That’s...
  • Finding Changeable Properties

    All PowerShell Versions When you get back results from PowerShell cmdlets, the results are objects and have properties. Some properties can be changed, others are read-only. Here is a simple trick to find out the object properties that you can actually...
  • Getting a Variable Inventory

    PowerShell ISE 3 and later For documentation purposes, you may want to get a list of all variables that a PowerShell script uses. Here is a function called Get-Variable: function Get-Variable { $token = $null $errors = $null $ast = [ System.Management...
  • Renaming Variables

    PowerShell ISE 3 and later Here is a simple variable renaming function that you can use in the built-in ISE editor that ships with PowerShell 3 and later. It will identify any instance of a variable and then replace it with a new name. function Rename...
  • Normalizing Line Endings

    All PowerShell Versions When you download files from the Internet, you may run into situations where the file won’t open correctly in editors. Most likely, this is caused by non-default line endings. Here is an example of such a problem. In a previous...
  • 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...
  • Getting MAC Addresses

    All PowerShell Versions Getting the MAC of a network adapter is rather simple in PowerShell. Here is one of many ways: PS> getmac /FO CSV | ConvertFrom-Csv Physical Address Transport Name ---------------- -------------- 5C-51-4F-62-F2-7D \Device\Tcpip_...
  • Advanced Text Splitting

    All PowerShell Versions When you use the –split operator to split text, then the split text is consumed: PS> 'Hello, this is a text, and it has commas' -split ',' Hello this is a text and it has commas As you see, the commas are...
  • Text Splitting

    All PowerShell Versions With the –split operator, you can split text at given locations. The operator expects a regular expression, so if you just want to split using plain text expressions, you need to escape your split text. Here is an example...
  • Replacing Duplicate Spaces

    All PowerShell Versions To eliminate any duplicate space, try this regular expression: PS> '[ Man, it works! ]' -replace '\s{2,}', ' ' [ Man, it works! ] You can use this approach also to convert fixed-width text tables to CSV...
  • Creating TinyURLs

    All PowerShell Versions You probably have heard about shortening long URLs. There are plenty of free services available. Here is a script that turns any URL into a tiny URL: $OriginalURL = ' http://www.powertheshell.com/isesteroids2 ' $url = "http...
  • Finding PowerShell Functions

    PowerShell 3.0 and later To quickly scan your PowerShell script repository and find all files that have a given function in them, try this filter: filter Find-Function { $path = $_ . FullName $lastwrite = $_ . LastWriteTime $text = Get-Content -Path ...
  • Dumping Service State Information

    All PowerShell Versions If you would like to save the results of a PowerShell command to disk so that you can take it with you to another machine, here is a simple way: $Path = " $env:temp\mylist.xml " Get-Service | Add-Member -MemberType NoteProperty...
  • Comparing Service Configuration

    PowerShell 3 and later Provided you have PowerShell remoting up and running on two servers, here is a simple script that illustrates how you can get the state of all services from each server and then calculate the differences between the two servers...
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