Скачать или смотреть How to Retrieve Command Line of Processes with Get-NetTCPConnection in PowerShell

Learn how to effectively use PowerShell to retrieve the command line of processes associated with TCP connections using Get-NetTCPConnection. This guide provides step-by-step instructions and solutions to common issues.
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How to Retrieve Command Line of Processes with Get-NetTCPConnection in PowerShell

If you have been working with PowerShell and need to find out more information about the command lines of various processes associated with TCP connections, you might have run into some roadblocks. One of the biggest challenges is to extract the command line for each process while using the Get-NetTCPConnection cmdlet. If you've tried executing a command to achieve this only to find that the command line output is blank, you're not alone. In this post, we'll break down how to successfully retrieve command lines of processes linked with TCP connections in a clear, organized manner.

Problem Overview

When using the Get-NetTCPConnection cmdlet, you might have tried to run the following command to extract the command lines based on OwningProcess IDs:

[[See Video to Reveal this Text or Code Snippet]]

Unfortunately, you may have encountered empty or missing command lines in your results. This is often due to the syntax used when referencing the OwningProcess property within a script block. Let's take a look at the solution.

Solution: Correcting the Command Syntax

To retrieve the command line of each associated process correctly, you need to follow these steps:

Step 1: Utilize Subexpressions for Variable Expansion

The first main adjustment is to use subexpressions ($()) to properly expand the OwningProcess variable. You should modify your command as follows:

[[See Video to Reveal this Text or Code Snippet]]

Why Use a Subexpression?

Only the base variable can expand in double quotes without requiring a subexpression. By using $($_.OwningProcess), PowerShell understands that it should take the value from the pipeline object.

Step 2: Adjust Command Order to Retrieve the Desired Number of Processes

If you're specifically looking for the last 7 processes, you will need to swap the order of Select-Object and Format-Table. Doing so will ensure that the table formatting does not interfere with the selection of processes. The revised command would look like this:

[[See Video to Reveal this Text or Code Snippet]]

This way, you ensure that you are pulling the correct data without losing any entries due to formatting.

Conclusion

By applying these changes to your PowerShell command, you should now be able to retrieve the command lines of processes associated with TCP connections without issues. Remember, the use of subexpressions and correctly ordering your commands is crucial to getting the results you need.

Utilizing the correct syntax will not only improve your scripts but also enhance your efficiency while performing tasks in PowerShell. Happy scripting!