Cmdlet Process and Service Management

Managing processes and services is a very important part of system maintenance and automated operations.

PowerShell provides a concise yet powerful set of Cmdlets for viewing, starting, stopping, filtering, and controlling processes and services on local (or remote) computers.

This section will explain in detail how to use PowerShell to manage processes and services, including basic operation commands, typical application scenarios, and common issues, helping you improve system management efficiency.

1. Process Management (Process)

PowerShell uses.NETprocess objects to handle process operations. Common Cmdlets include:

Cmdlet	Function
`Get-Process`	Get running processes
`Stop-Process`	Stop specified processes
`Start-Process`	Start a new process (program)
`Wait-Process`	Wait for a process to end

View processes:`Get-Process`

View all running processes:

Get-Process

View a specific process (e.g., notepad):

Get-Process -Name notepad

View multiple processes:

Get-Process -Name chrome, notepad

Get process details and sort them:

Get-Process | Sort-Object CPU -Descending | Select-Object -First 5

Stop-Process

Stop by process name:

Stop-Process -Name notepad

Stop by process ID:

Stop-Process -Id 1234

Forcefully terminate processes (to avoid interactive prompts):

Stop-Process -Name notepad -Force

Start processes:`Start-Process`

Open Notepad:

Start-Process notepad

Open PowerShell as administrator (the current window needs permission):

Start-Process powershell -Verb RunAs

Start a web browser and visit a URL:

Start-Process "https://learn.microsoft.com"

Wait for processes:`Wait-Process`

Continue after the process finishes execution:

Start-Process notepad
Wait-Process -Name notepad
Write-Output "记事本已关闭"

2. Service Management (Service)

PowerShell has comprehensive support for service management. Common Cmdlets are as follows:

Cmdlet	Function Description
`Get-Service`	View service status
`Start-Service`	Start a service
`Stop-Service`	Stop a service
`Restart-Service`	Restart a service
`Set-Service`	Change service properties

View services:`Get-Service`

View all services:

Get-Service

Filter services that are running:

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

View a specific service:

Get-Service -Name W32Time

Start and stop services

Start the Windows Time service:

Start-Service -Name W32Time

Stop a service (an error may occur if permissions are insufficient):

Stop-Service -Name W32Time

Restart services:`Restart-Service`

Restart-Service -Name W32Time

Change service settings:`Set-Service`

Set the service startup type to Automatic:

Set-Service -Name W32Time -StartupType Automatic

Disable a service:

Set-Service -Name W32Time -StartupType Disabled

3. Differences between Services and Processes

Comparison Item	Service	Process
Startup Method	Automatic start / Manual start / Disabled	Triggered manually by user or by a program
Running State	Continuously runs in the background, usually without a UI	Can interact in the foreground, with a shorter lifecycle
Management Method	`Get-Service`, `Start-Service`wait	`Get-Process`, `Start-Process`wait
Example	Windows Update（wuauserv）	Notepad, chrome.exe, etc.

4. Practical Examples

Example 1: Detect and restart a service that stopped abnormally

$svc = Get-Service -Name Spooler
if ($svc.Status -ne "Running") {
    Restart-Service -Name Spooler
    Write-Output "服务已重启"
}

Example 2: Close all processes with CPU usage higher than 50 (use with caution)

Get-Process | Where-Object { $_.CPU -gt 50 } | Stop-Process -Force

Note: Such operations must be performed in a test environment or when it is confirmed that there is no risk.

5. Common Issues and Precautions

Issue	Reason and Suggested Explanation
Cannot stop the service	Administrator permissions are required. It is recommended to use "Run as administrator"
Incorrect spelling of process name or service name	You can first use`Get-Process`or`Get-Service`to get the exact name
The service has stopped but still shows as Running	Some services have protection mechanisms. It is recommended to use`Restart-Service`to try restarting

6. Summary

PowerShell makes process and service management simple and efficient through its standardized command set:

UseGet-*to view information,Start-*/Stop-*to control behavior,Set-*to modify properties
Pipeline + conditional filtering + object operations are suitable for batch management tasks
It can be combined with scheduled tasks and monitoring scripts to build an automated operations system

Other Extensions