Feb 12

PowerShell™ Notes for Professionals & other books

Stack Overflow used to run an interesting project – Stack Overflow Documentation. It is currently shut down, but thanks to it we now have interesting free books like “PowerShell™ Notes for Professionals book“:

Please keep in mind it was created by SO content that may not be very accurate, like what I’d recently discovered:Are the cmdlets in a pipeline executing in parallel?

Anyway I’d recommend it since it contains an essentials compilation of PowerShell common tasks and language specifics.Good reading indeed!

There are also other books that may catch your interest:http://books.goalkicker.com/

Jan 10

Dynamic Objects in Active Directory

Sometimes we need to create users/groups/computers in Active Directory that will be used temporary (by a contractor, for testing etc.). The typical workflow is: Create > Use for a while > Delete. The deletion is manual and often these objects are being forgotten which poses some security risks.

It is little known fact that we can create the so called Dynamic objects (DOs, a.k.a. temporary objects) that get deleted from AD automatically when the associated TTL expires. Microsoft added this capability in Windows Server 2003. In fact the “Dynamic object” is an auxiliary class (OID = When linked to an object it adds some new attributes like the entryTTL (Entry-TTL) and ms-DS-Entry-Time-To-Die attribute.

Continue reading

Jan 05

WinRM would not listen on port 5985

The WinRM was configured to allow remote administration via a GPO but it wouldn’t let us connect with Enter-PSSession. The firewall rule was there passing the traffic on TCP port 5985.

Checking WinRM config showed something strange:

winrm enumerate winrm/config/listener

Listener [Source=”GPO”]
Address = *
Transport = HTTP
Port = 5985
Enabled = true
URLPrefix = wsman
ListeningOn = null

So WinRM was actually configured but wasn’t listening on any network interface. Why?

Continue reading

Jan 03

What is Add-PrinterDriver actually used for?

As of Windows 8.1 / Server 2012 R2 there is one beautiful cmdlet -Add-PrinterDriver. It dramatically simplifies driver/printer installation.

Naturally you will be tempted to install a driver from an .inf file like this:

Add-PrinterDriver -Name "HP Universal Printing PCL 6" -InfPath "C:\Install\HP\hpcu160u.inf"

But you will be blamed:

Add-PrinterDriver: One or more specified parameters for this operation has an invalid value.

So it does not work as you/we may think. Sigh… So then what it is used for?

Continue reading

Aug 18

PowerShell вече е с отворен код и работи под Линукс!

Добри новини за любителите на PowerShell! Вече можем да използваме любимия shell под Linux и Mac 🙂

PowerShell is open sourced and is available on Linux

Не пропускайте и видеото с Бащата на PowerShell – Jeffrey Snover

Ето и кадри от събитието 🙂

Great day!