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PowerShell Remote Operations is the foundation of remote management and provides yet another reliable and efficient way to centrally manage distributed systems.

PowerShell remoting generally relies on remoting infrastructure, except for a few commands that have remoting capabilities of their own, such as Get-Service, Get-Process, Get-WMIObject, Get-EventLog, and Get-WinEvent. (It is easy to see that these commands are all "reading" information about some aspect of the system without making changes.) They rely on the. Net Framework for remote operations.)

Configure remote infrastructure

Remote infrastructure is the foundation of remote operations, and only when remote infrastructure is set correctly can remote commands be executed correctly. The good news is that remote infrastructure, while important, is simple to configure. In fact, remote operation can be performed as long as the following two points are set:

1. Run as an administrator. To operate remotely, you must launch the PowerShell command line as an administrator, even if the current user is a system administrator.

2. Enable remote processing mode. When remoting mode is enabled, commands that depend on remote infrastructure execute correctly. To enable remoting mode, use the enable-ps removing command. Some systems have enabled remote processing mode by default. Check whether remote processing mode is enabled. You can execute the new-pssession command. If the new session is successfully created, remote mode starts and remote infrastructure configuration succeeds.

Perform remote operations

With the remote infrastructure configured, remote operations can be performed. Remote operations rely primarily on several Session commands and Invoke-Command commands. There are three common usage scenarios:

Scenario 1: Remote Interactive Session

This scenario is typically used for manual remote operations, typing commands, and viewing results. The solution is simple. The command to enter an interactive session is Enter-PSSession, and to exit, type Exit-PSSession or exit. During remote interactive operations, commands entered run on the remote computer as if they were entered and executed directly on the remote computer. Variables and command execution results defined during are no longer available after exiting the interactive session.

Scenario 2: One-time execution of script blocks and script files

This scenario involves establishing a temporary session between the local computer and the remote computer. Send script blocks or the contents of script files to a remote computer for execution and send results back to the local computer. This method is highly efficient and is PowerShell's recommended method for executing remote commands. This method is recommended unless you need to share data in a session.

Scenario 3: Script blocks, script files executed in naming sessions

This scenario is the most complex and also the most powerful. Sessions retain all defined variables, functions, and scripts, imported modules, and snap-ins, facilitating data sharing. The method of use is as follows:

1. Define a session: Use the new-pssession command to define a session, such as $session1 = new-pssession-computer server1. (Use the Credential parameter if necessary.)

2. Executing scripts (or script files) remotely in a session: Use Invoke-Command to execute remote scripts, such as Invoke-Command -Session $session1 -ScriptBlock {dir c:\} or Invoke-Command -Session $session1 -FilePath .\ dirDriveC.ps1

3. Get results: You can assign the execution results to variables, such as $sub = Invoke-Command -Session $session1 -ScriptBlock {dir c:\} or $sub = Invoke-Command -Session $session1 -FilePath .\ dirDriveC.ps1

Subsequent commands can be executed as if they were executed in the same context by following steps 2 or 3.

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