Category: PowerShell

Presenting PowerShell Non-Monolithic Script Module Design this weekend at SQL Saturday Chattanooga

If you’re interested in some free PowerShell training, I’ll be presenting a session on "PowerShell Non-Monolithic Script Module Design" at SQL Saturday #624 in Chattanooga, Tennessee this Saturday, June 24th. My presentation begins at 1:15pm eastern time and is an intermediate level session. There's also a PowerShell precon on Friday being presented by Microsoft MVP Aaron Nelson (the precon is not free) and a PowerShell DSC (Desired State Configuration) session on Saturday being presented Read more [...]

Simple Obfuscation with PowerShell using Base64 Encoding

I recently received a question from someone wanting to know how I encoded a string of text on my blog site. Back in January of 2013, I competed in Jeff Hicks PowerShell Challenge that was held by TrainSignal. One of the questions had an encoded command which you were to decode. I figured out that the -EncodedCommand parameter of PowerShell.exe could not only be used to run commands that are encoded with Base64, that it could also be used to easily decode a string of text that was encoded with Base64. The Read more [...]

What is this Module Scope in PowerShell that you Speak of?

Last week I posted a blog article about a PowerShell script module that I had written with a few proof of concept commands to manage a Nimble Storage Area Network using their REST API. That module used a command to connect and authenticate to the storage device which needed to share a token with other commands in the module otherwise authentication would have to be performed for each command. I initially placed the token in a global variable even though I mentioned in the blog article that I’m Read more [...]

PowerShell and the Nimble Storage REST API

If you read my previous blog article on "PowerShell Function to Determine the Installed VSS Providers" then you're already aware that I recently migrated one of my customers to a Nimble Storage Area Network. While Nimble does have a PowerShell module and it's decent, I wanted to see how difficult it is to work with their REST API directly with PowerShell. Their REST API documentation also seems to be decent. Note: All of the functions shown in this blog article are a proof of concept and should Read more [...]

PowerShell Function to Determine the Installed VSS Providers

I've been migrating one of my customers from some older EqualLogic storage area networks to a Nimble SAN. It has all been good with the exception of some problems with VSS (Volume Shadow Copy Service). They use Altaro for backups and from what I've found, Nimble and Altaro don't play well together when it comes to VSS. Nimble's software was installed on the Hyper-V hosts and all three vendors (Nimble, EqualLogic, and Altaro) VSS providers seemed to play well together until volumes were actually moved Read more [...]

Use PowerShell to Determine if Specific Windows Updates are Installed on Remote Servers

It has been a crazy week to say the least. If you're like me, you wanted to make sure that the specific Windows updates that patch the WannaCry ransomware vulnerability have been installed on all of your servers. I've seen a lot of functions and scripts this week to accomplish that task, but most of them seem too complicated in my opinion. While it's personal preference, I also always think about whether I should use a PowerShell one-liner, script, or function. Usually one-liners are something Read more [...]

Retrieve Information about your Favorite Podcast with PowerShell

This past weekend, I attended the 2017 Atlanta MVP Community Connection. While there, I met fellow Microsoft MVP Allen Underwood who is one of the co-host of the {CodingBlocks}.NET podcast. I listened to their podcast on my trip back home from Atlanta and later discovered that their podcast has an RSS feed for episodes. A simple PowerShell one-liner can be used to retrieve information about each episode of their podcast: Keep in mind that a PowerShell one-liner Read more [...]

PowerShell Function to Determine PSSessions to your Servers

This past week, I needed to determine if anyone had a PSSession connected to any of the servers that I support. This is fairly easy to accomplish with a PowerShell one-liner, but I can never remember the syntax so I decided to create a reusable function to accomplish the task. The function accepts multiple computer names via parameter input: It also accepts the computer names via pipeline input and it has a Credential parameter Read more [...]

PowerShell One-Liner to Query multiple WMI Classes with a CIM Session

Today I thought I would share a one-liner that I recently wrote to query the Manufacturer, Model, and Serial Number information from numerous remote servers. Sounds simple enough, right? This one-liner starts out by using my New-MrCimSession function to create a CIM session to each of the specified servers. This function automatically determines if the remote server supports the WSMan protocol and falls back to DCom if it doesn't: Two different WMI classes Read more [...]

Determine the Default Password Policy for an Active Directory Domain with PowerShell

I've been working with PowerShell since the version 1.0 days and I'm still amazed that I find cmdlets that I didn't know existed. Back in 2003, I had written some PowerShell code to query group policy for the lockout policy of an Active Directory domain. It used code similar to what's shown in the following example which requires the GroupPolicy PowerShell module that installs as part of the RSAT (Remote Server Administration Tools). I recently discovered that Read more [...]

Test Active Directory User Accounts for a Default Password with PowerShell

How do you control password resets in your environment? I've worked for numerous companies where their forgotten password reset process was all over the board. Hopefully you have a process in place that allows you to sleep at night. Even with the best policies and procedures in place, what happens when someone on your help desk staff resets a users password to some default password and forgets to set the account so the password has to be changed at next logon? Is the user still using that default Read more [...]

Video: PowerShell Non-Monolithic Script Module Design

This past Tuesday night, I presented a session on "PowerShell Non-Monolithic Script Module Design" for the Arizona PowerShell Users Group. The video from that presentation is now available. The presentation begins at 10 minutes and 30 seconds seconds into the video. https://www.youtube.com/watch?v=XH7ajz3WT0A#t=10m30s The presentation materials to include the slide deck and code can be found in my presentations repository on GitHub. µ Read more [...]

PowerShell Function to Determine the Hyper-V Host for a VM

This week, I thought I would share a PowerShell function that I wrote to determine what Hyper-V host server a VM (virtual machine) resides on. In this scenario, you have no idea which Hyper-V host a VM resides on. First off, let me say that this function is written a bit unorthodox. Typically you'll see functions written where each item in the ComputerName array is iterated through one at a time. Since this function uses the PowerShell remoting Invoke-Command Read more [...]

Convert, Resize, and Optimize VHD and VHDX files with PowerShell

I recently received an email from someone who attended one of my presentations asking if I had a blog article on using PowerShell to compact and optimize VHD files. Since I didn't have a blog article on that subject, I decided to create one. The process itself is fairly simple. The examples shown in this blog article are being run on a Windows 10 computer which has Hyper-V enabled on it. Only specific SKU's of Windows 10 are capable of running Hyper-V. The same process can be used on servers running Read more [...]

Presenting 2 PowerShell sessions this weekend at SQL Saturday Birmingham

If you're interested in some free PowerShell training, I'll be presenting two PowerShell sessions at SQL Saturday #593 in Birmingham, Alabama this Saturday, March 18th. My first one hour presentation begins at 9:40am central time and is geared for beginners. The content covered in this session is based off of a book by the same title that I'm currently writing. PowerShell 101: The No-Nonsense Beginner’s Guide to PowerShell Interested in PowerShell but not sure how to get started? Already Read more [...]