Pipeline object flow in PowerShell

Introduction

The pipeline lets you send data from one command to another easily, like passing a ball between friends.

You want to list files and then filter only certain types.

You need to get processes and sort them by memory use.

You want to find services that are running and display their names.

You want to take output from one command and use it as input for another without saving to a file.

Syntax

PowerShell

command1 | command2 | command3

The pipe symbol | sends output from one command as input to the next.

Each command works on objects, not just text, making it powerful and flexible.

Examples

Gets all running processes and sorts them by CPU usage from highest to lowest.

PowerShell

Get-Process | Sort-Object CPU -Descending

Lists all files and filters only those with the .txt extension.

PowerShell

Get-ChildItem | Where-Object { $_.Extension -eq ".txt" }

Finds all running services and shows their names and status.

PowerShell

Get-Service | Where-Object { $_.Status -eq "Running" } | Select-Object Name, Status

Sample Program

This script lists files in the current folder that are larger than 1000 bytes and shows their names and sizes.

PowerShell

Get-ChildItem | Where-Object { $_.Length -gt 1000 } | Select-Object Name, Length

Important Notes

The pipeline passes objects, so you can access properties like $_.Name or $_.Length inside commands.

Use curly braces { } to write conditions or scripts inside the pipeline.

You can chain many commands with | to build complex tasks step-by-step.

Summary

The pipeline uses | to send data from one command to another.

It works with objects, making filtering and sorting easy.

You can combine commands to do powerful tasks without extra files.