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UNDERSTAND THE BASICS OF POWERSHELL 13
Administering Service Delivery
PART I
example, if you want to get information about a speci c service on your computer,
you can run the same
Get-Service cmdlet that you just ran, but this time specify
the name of the service as a parameter. Figure 1.7 shows the output of the
Get-
Service cmdlet run against the Windows Update service.
FIGURE 1.7 Adding a parameter to a cmdlet
 e -Name parameter shown in Figure 1.7 is a positional parameter.  is means you
don’t have to specify -Name when using the parameter. If you ran the same cmdlet
but didn’t include -Name in the command, the cmdlet would assume that the  rst
unnamed parameter was the -Name parameter.  at makes the following two
commands identical:
Get-Service -Name “Windows Update”
Get-Service “Windows Update”
 is next command is also identical to the  rst two:
Get-Service -ComputerName localhost “Windows Update”
In the previous command, the  rst parameter used ( -ComputerName ) is a named
parameter, because the parameter is speci ed by using -ComputerName in the
command, followed by the name of the computer (localhost in this case).  e
second parameter wasn’t named. However, because it’s the  rst unnamed parameter
in the command, the cmdlet assumes that it’s the
-Name parameter. It’s the same as
using the following command:
Get-Service -ComputerName localhost -Name “Windows Update”
You’ll learn how to  nd out which parameters are positional or named, along with
their default values, later in this chapter.
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