PowerShell

Windows Management Instrumentation: WMI Commands

Windows Management Instrumentation (WMI) is the Microsoft implementation of Web-Based Enterprise Management (WBEM), which is an industry initiative to develop a standard technology for accessing management information in an enterprise environment.

WMI is part of Windows since Windows 2000. It is a service that can query almost every detail about a computer system. PowerShell ships with full WMI support.

These are the most important CIM (Common Information Model) cmdlets and are fully supported by PowerShell.

Cmdlets used in PowerShellDescription
Get-CimInstance
Gets instances of WMI classes. This is the most important cmdlet  
Get-CimClassGets a WMI class. Use it to access static WMI methods.
Invoke-CimMethodRuns a WMI method, and returns results.
Set-CimInstanceWrites back changed properties.
New-CimSessionCreates a new remoting session to one or more remote systems
New-CimSessionOptionDefines special options for remoting connections.
Remove-CimSessionCloses and removes a remoting session that is no longer used.
New-CimInstanceCreates a new instances of a WMI class, i.e. for temporary use.

WMI Commands – How to query information using WMI (Get-CimInstance).

To get information from WMI, you ask for instances of a given class. The PowerShell code for this is always the same, so the hardest part in WMI is to figure out the name of the class that describes what you are after.

1: BIOS

Get-CimInstance -ClassName Win32_BIOS

Or run

- Get-CimInstance
And enter the class name at the prompt
- Win32_BIOS

2. DISK – list logical disk information

Get-CimInstance -ClassName Win32_LogicalDisk

or run

- Get-CimInstance
And enter the class name at the prompt.
- Win32_LWin32_LogicalDisk

The WMI namespace root/cimv2 is the default namespace and contains classes for computer hardware and configuration.

root/cimv2 contains the following 276 classes:

The namespace root/cimv2 contains many more classes that may serve internal purposes (link classes to define relationships, abstract classes that serve as a template for inherited classes, etc. Take a look at the other class types.

I hope you found this blog post helpful. If you have any questions, please let me know in the comment session.

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