Datasheet

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14 CHAPTER 1

•

USING POWERSHELL WITH ACTIVE DIRECTORY

Each cmdlet has a di erent set of parameters that it recognizes.  e

-ComputerName

parameter in the previous example is only relevant for the

Get-Service

cmdlet. If

you tried to pass it into the

Get-ChildItem

cmdlet, an error would be thrown:

PS C:\> Get-ChildItem -ComputerName localhost

Get-ChildItem : A parameter cannot be found that matches parameter name ‘Comput

erName’.

At line:1 char:28

+ Get-ChildItem -ComputerName <<<< localhost

+ CategoryInfo : InvalidArgument: (:) [Get-ChildItem], ParameterB

indingException

+ FullyQualifiedErrorId : NamedParameterNotFound,Microsoft.PowerShell.Comm

ands.GetChildItemCommand

However, PowerShell implements some parameters that are common to all cmdlets.

 ese are referred to as common parameters. You can retrieve a list of common

parameters in PowerShell by running the following command:

Get-Help about_CommonParameters

Table 1.2 lists the common parameters and describes what each does.

TABLE 1.2 Command Parameters

Name Description

-Verbose

Includes detailed information in the output of the cmdlet. This is typically

in-depth information that may not be commonly used.

-Debug

Includes programmer-level detail in the output of the cmdlet. In most

day-to-day administration tasks, the

-Debug

parameter is rarely used.

-WarningAction

Speciﬁ es what the cmdlet should do if it encounters a warning. The pos-

sible values are

SilentlyContinue

(continue executing the cmdlet

without notiﬁ cation),

Continue

(display a notiﬁ cation and then continue

executing the cmdlet),

Inquire

(ask the user whether to stop or keep

going), and

Stop

(stop execution of the cmdlet).

-WarningVariable

Speciﬁ es a variable to which warning information can be written. You can

use this variable later in other commands or scripts.

-ErrorAction

Speciﬁ es what the cmdlet should do if it encounters an error. The pos-