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Monthly Archives: May 2018
Splitting into pairs
During my session on scriptblocks at Summit 2018 I showed how to split a string into pairs of values Start with this string PS> $str = ‘Jack,Jill,Bill,Ben,Eric,Ernie,Cagney,Lacey’ You want the string split in the commas – but every other comma … Continue reading
Posted in Powershell
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Summit 2018 sessions
The code and slides from my Summit 2018 sessions can be found at https://github.com/RichardSiddaway/Summit2018TroubleShootingRemoting and https://github.com/RichardSiddaway/Summit2018ScriptBlocksDecoded
Posted in Powershell, Summit
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PowerShell functionality
PowerShell functionality – in the form of modules – comes from a number of different sources. These are: Powershell itself including the Microsoft.PowerShell.* modules and CIM cmdlets Windows Team – this includes the modules such as NetAdapter, NetTCPIP, Storage that … Continue reading
Posted in Powershell
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Hyper-V book
The Month of Lunches Hyper-V book I was working on was cancelled by the publisher. The good news is that it’s most likely going to be resurrected with another publisher and will hopefully be available later this year. More to … Continue reading
Posted in Hyper-V
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WMI and CIM accelerators
In PowerShell an accelerator is a shortcut to a .NET type. The WMI accelerators have been around since PowerShell v1. The WMI accelerators were heavily used in v1 fill some of the gaps in cmdlet coverage. The CIM accelerators appeared … Continue reading
Posted in PowerShell and CIM, PowerShell and WMI
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PowerShell parameter sets
PowerShell parameter sets allow you to control which parameters can be used together. If a parameter isn’t in the parameter set you’re trying to use you’ll get an error message. PS> Get-VM -Name XYZ -id (New-Guid) Get-VM : Parameter set … Continue reading
Posted in Powershell
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PowerShell version
Discovering the PowerShell version you’re using can be an interesting task. The automatic variable $PSVersionTable was introduced in PowerShell v2. On my Windows 10 version 1803 machine for Windows PowerShell I get PS> $PSVersionTable Name Value —- —– PSVersion 5.1.17134.48 … Continue reading
Posted in PowerShell v5, PowerShell v6
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Format Data
PowerShell will format the output of objects that it knows about. For instance Get-Process shows different sets of properties depending on whether you choose a table or list view. The format data is stored in files named *.format.ps1xml. In Windows … Continue reading
Posted in PowerShell v6
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where –not
PowerShell v6.1 preview 2 has added the where –not option. The option adds another parameter to the syntax where-object <property name> <operator like parameter> <value> Couple of examples of using the syntax Get-Process | where CPU -gt 12 Get-Service | … Continue reading
Posted in PowerShell v6
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Calculating standard deviation
Calculating a standard deviation isn’t a difficult exercise but PowerShell v6.1 offers an easier method. In Windows PowerShell v5.1 and PowerShell v6.0 the Measure-Object cmdlet has this syntax PS> Get-Command Measure-Object -Syntax Measure-Object [[-Property] <string[]>] [-InputObject <psobject>] [-Sum] [-Average] [-Maximum] … Continue reading
Posted in PowerShell v6
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