Get-Command [[-Name] <string[]>] [[-ArgumentList] <Object[]>] [-CommandType {<Alias> | <Function> | <Filter> | <Cmdlet> | <ExternalScript> | <Application> | <Script> | <All>}] [-Module <string[]>] [-Syntax] [-TotalCount <int>] [<CommonParameters>]

Get-Command [[-ArgumentList] <Object[]>] [-Module <string[]>] [-Noun <string[]>] [-Syntax] [-TotalCount <int>] [-Verb <string[]>] [<CommonParameters>]

C:\PS>get-command

Description
-----------
This command gets the Windows PowerShell cmdlets, functions, and aliases in the current session.

C:\PS>get-command -verb set | format-list *

Description
-----------
This command gets commands with the verb "set", and it displays all properties of the commands in a list.

C:\PS>get-command -type cmdlet | sort-object noun | format-table -group noun

Description
-----------
This command gets all of the cmdlets, sorts them alphabetically by the noun in the cmdlet name, and then displays them in noun-based groups. This display can help you find the cmdlets for a task.

C:\PS>get-command -module Microsoft.PowerShell.Security, TestModule

Description
-----------
This command gets the commands in the Microsoft.PowerShell.Security snap-in and the Test-Module module.

C:\PS>get-command get-childitem -args cert: -syntax

Description
-----------
This command gets the syntax of the Get-ChildItem cmdlet when it is used in the Cert: drive. 

When you compare the syntax displayed in the output with the syntax that is displayed when you omit the Args (ArgumentList) parameter, you'll see that the Certificate provider adds a dynamic parameter, CodeSigningCert, to the Get-ChildItem cmdlet.

C:\PS>function Get-DynamicParameters
{
	param ($cmdlet, $psdrive)
	(get-command $cmdlet -ArgumentList $psdrive).parametersets | foreach-object {$_.parameters} | where-object { $_.IsDynamic } | select-object Name -unique
}

Get-DynamicParameters -cmdlet Get-ChildItem -psdrive cert:

Name
----
CodeSigningCert

Description
-----------
The function in this example gets the dynamic parameters that are added to a cmdlet when it is used in a specified drive. This is an alternative to the method used in the previous example.

The command in the example uses the Get-DynamicParameters function to get the dynamic parameters that the Certificate provider adds to the Get-ChildItem cmdlet when it is used in the Cert: drive.

C:\PS>get-command *

Description
-----------
This command gets all commands in the current session.

It also gets information about all of the files in the paths of the Path environment variable ($env:path). It returns an ApplicationInfo object (System.Management.Automation.ApplicationInfo) for each file, not a FileInfo object (System.IO.FileInfo).

C:\PS>get-command | where-object {$_.definition -like "*first*"}

CommandType	 Name						Definition
-----------	 ----						---------
Cmdlet		Select-Object			 Select-Object [[-Property]

Description
-----------
This command finds a cmdlet or function based on the name of one of its parameters. You can use this command to identify a cmdlet or function when all that you can recall is the name of one of its parameters.

In this case, you recall that one of the cmdlets or functions has a First parameter that gets the first "n" objects in a list, but you cannot remember which cmdlet it is.

This command uses the Get-Command cmdlet to get a CmdletInfo object representing each of the cmdlets and functions in the session. The CmdletInfo object has a Definition property that contains the syntax of the cmdlet or function, which includes its parameters. 

The command uses a pipeline operator (|) to pass the CmdletInfo object to the Where-Object cmdlet, which examines the definition (syntax) of each object ($_) for a value that includes "first".

The result shows that the First parameter belongs to the Select-Object cmdlet.

C:\PS>get-command dir | format-list

Name			: dir
CommandType	 : Alias
Definition		: Get-ChildItem
ReferencedCommand : Get-ChildItem
ResolvedCommand   : Get-ChildItem

Description
-----------
This example shows how to use the Get-Command cmdlet with an alias. Although it is typically used on cmdlets, Get-Command also gets scripts, functions, aliases, and executable files.

This command displays the "dir" alias in the current console. The command pipes the result to the Format-List cmdlets.

C:\PS>get-command notepad

CommandType	 Name		 Definition
-----------	 ----		 ----------
Application	 notepad.exe	C:\WINDOWS\system32\notepad.exe
Application	 NOTEPAD.EXE	C:\WINDOWS\NOTEPAD.EXE

Description
-----------
This example shows how to use Get-Command to determine which command Windows PowerShell runs when the session contains multiple commands with the same name. When you use the Name parameter without wildcard characters, Get-Command lists the commands with that name in execution precedence order.

This command shows which Notepad program Windows PowerShell runs when you type "Notepad" without a fully qualified path. The command uses the Name parameter without wildcard characters. 

The sample output shows the Notepad commands in the current console. It indicates that Windows PowerShell will run the instance of Notepad.exe in the C:\Windows\System32 directory.

C:\PS>(get-command get-date).pssnapin

C:\PS> (get-command remove-gpo).module

Description
-----------
These commands show how to find the snap-in or module from which a particular cmdlet originated.

The first command uses the PSSnapin property of the CmdletInfo object to find the snap-in that added the Get-Date cmdlet. 

The second command uses the Module property of the CmdletInfo object to find the module that added the Remove-GPO cmdlet.

C:\PS>get-command -type cmdlet | where-object {$_.outputtype} | format-list -property name, outputtype

Description
-----------
This command gets the cmdlets in the session and the .NET type of the objects that they return. 

The first part of the command gets the cmdlets in the session. A pipeline operator (|) sends the cmdlet objects to the Where-Object cmdlet, which selects only the ones in which the OutputType property is populated. Another pipeline operator sends the selected cmdlet objects to the Format-List cmdlet, which displays the name and output type of each cmdlet in a list.

The OutputType property of Get-Command has a non-null value only when the cmdlet code defines the OutputType attribute for the cmdlet.