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ABOUT REMOTE
SHORT DESCRIPTION
Describes how to run remote commands in Windows PowerShell.
LONG DESCRIPTION
You can run remote commands on a single computer or on multiple computers
by using a temporary or persistent connection. You can also start an
interactive session with a single remote computer.
This topic provides a series of examples to show you how to run different
types of remote command. After you try these basic commands, read the Help
topics that describe each cmdlet that is used in these commands. The topics
provide the details and explain how you can modify the commands to meet
your needs.
Note: To use Windows PowerShell remoting, the local and remote computers
must be configured for remoting. For more information, see
about_Remote_Requirements.
HOW TO START AN INTERACTIVE SESSION (ENTER-PSSESSION)
The easiest way to run remote commands is to start an interactive session
with a remote computer.
When the session starts, the commands that you type run on the remote
computer, just as though you typed them directly on the remote computer.
You can connect to only one computer in each interactive session.
To start an interactive session, use the Enter-PSSession cmdlet. The
following command starts an interactive session with the Server01 computer:
Enter-PSSession Server01
The command prompt changes to indicate that you are connected to the
Server01 computer.
Server01\PS>
Now, you can type commands on the Server01 computer.
To end the interactive session, type:
Exit-PSSession
For more information, see Enter-PSSession.
HOW TO USE CMDLETS THAT HAVE A COMPUTERNAME PARAMETER TO GET REMOTE DATA
Several cmdlets have a ComputerName parameter that lets you get objects
from remote computers.
Because these cmdlets do not use WS-Management-based Windows PowerShell
remoting, you can use the ComputerName parameter of these cmdlets on any
computer that is running Windows PowerShell. The computers do not have to
be configured for Windows PowerShell remoting, and the computers do not
have to meet the system requirements for remoting.
The following cmdlets have a ComputerName parameter:
Clear-EventLog Limit-EventLog
Get-Counter New-EventLog
Get-EventLog Remove-EventLog
Get-HotFix Restart-Computer
Get-Process Show-EventLog
Get-Service Stop-Computer
Get-WinEvent Test-Connection
Get-WmiObject Write-EventLog
For example, the following command gets the services on the Server01 remote
computer:
Get-Service -ComputerName Server01
Typically, cmdlets that support remoting without special configuration have
a COMPUTERNAME parameter and do not have a SESSION parameter. To find these
cmdlets in your session, type:
Get-Command | Where-Object {
$_.Parameters.Keys -contains 'ComputerName' -and
$_.Parameters.Keys -notcontains 'Session'
}
HOW TO RUN A REMOTE COMMAND
To run other commands on remote computers, use the Invoke-Command cmdlet.
To run a single command or a few unrelated commands, use the ComputerName
parameter of Invoke-Command to specify the remote computers. Use the
ScriptBlock parameter to specify the command.
For example, the following command runs a Get-Culture command on the
Server01 computer.
Invoke-Command -ComputerName Server01 -ScriptBlock {Get-Culture}
The ComputerName parameter is designed for situation in which you run a
single command or several unrelated commands on one or many computers. To
establish a persistent connection to a remote computer, use the Session
parameter.
HOW TO CREATE A PERSISTENT CONNECTION (PSSESSION)
When you use the ComputerName parameter of the Invoke-Command cmdlet,
Windows PowerShell establishes a connection just for the command. Then, it
closes the connection when the command is complete. Any variables or
functions that are defined in the command are lost.
To create a persistent connection to a remote computer, use the
New-PSSession cmdlet. For example, the following command creates PSSessions
on the Server01 and Server02 computers and then saves the PSSessions in the
$s variable.
$s = New-PSSession -ComputerName Server01, Server02
HOW TO RUN COMMANDS IN A PSSESSION
With a PSSession, you can run a series of remote commands that share data,
like functions, aliases, and the values of variables. To run commands in a
PSSession, use the Session parameter of the Invoke-Command cmdlet.
For example, the following command uses the Invoke-Command cmdlet to run a
Get-Process command in the PSSessions on the Server01 and Server02
computers. The command saves the processes in a $p variable in each
PSSession.
Invoke-Command -Session $s -ScriptBlock {$p = Get-Process}
Because the PSSession uses a persistent connection, you can run another
command in the same PSSession that uses the $p variable. The following
command counts the number of processes saved in $p.
Invoke-Command -Session $s -ScriptBlock {$p.count}
HOW TO RUN A REMOTE COMMAND ON MULTIPLE COMPUTERS
To run a remote command on multiple computers, type all of the computer
names in the value of the ComputerName parameter of Invoke-Command.
Separate the names with commas.
For example, the following command runs a Get-Culture command on three
computers:
Invoke-Command -ComputerName S1, S2, S3 -ScriptBlock {Get-Culture}
You can also run a command in multiple PSSessions. The following commands
create PSSessions on the Server01, Server02, and Server03 computers and
then run a Get-Culture command in each of the PSSessions.
$s = New-PSSession -ComputerName S1, S2, S3
Invoke-Command -Session $s -ScriptBlock {Get-Culture}
To include the local computer list of computers, type the name of the local
computer, type a dot (.), or type "localhost".
Invoke-Command -ComputerName S1, S2, S3, localhost -ScriptBlock {Get-Culture}
HOW TO RUN A SCRIPT ON REMOTE COMPUTERS
To run a local script on remote computers, use the FilePath parameter of
Invoke-Command.
For example, the following command runs the Sample.ps1 script on the S1 and
S2 computers:
Invoke-Command -ComputerName S1, S2 -FilePath C:\Test\Sample.ps1
The results of the script are returned to the local computer. You do not
need to copy any files.
HOW TO STOP A REMOTE COMMAND
To interrupt a command, press CTRL+C. The interrupt request is passed to
the remote computer where it terminates the remote command.
FOR MORE INFORMATION
- For information about the system requirements for remoting, see
about_Remote_Requirements.
- For help in formatting remote output, see about_Remote_Output.
- For information about how remoting works, how to manage remote data,
special configurations, security issues, and other frequently asked
questions, see about_Remote_FAQ.
- For help in resolving remoting errors, see
about_Remote_Troubleshooting.
- For information about PSSessions and persistent connections, see
about_PSSessions.
- For information about Windows PowerShell background jobs, see
about_Jobs.
KEYWORDS
about_Remoting
SEE ALSO
about_PSSessions
about_Remote_Disconnected_Sessions
about_Remote_Requirements
about_Remote_FAQ
about_Remote_TroubleShooting
about_Remote_Variables
Enter-PSSession
Invoke-Command
New-PSSession