Exercises
- List all services that are stopped
- List all service that are stopped and they name begins with W
- Display only the Display Name of services that stopped and their name begins with W
Lesson notes
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### Filtering # Some commands accept wild cards in the search or have a filter parameter Get-Service -Name w*,b* #But there's more universal method, based on property names Get-Service | Where-Object -Filter {$_.Status -eq 'running' } #So let's break it down #Where-Object allows to filter out the incoming object based on the comparation operator #Most popular operators are: -eq - Equals -ne - Not equals -gt - Greather than -lt - Less then -le - Less than or equal -ge - Greater than or equal -Like -Not like #There are more many, you can check these help topics: Help about_Operators Help about_Comparison_Operators #$_ is current object; it's what we're piping in our case Get-Service # .Status that follows $_ indicates we're passing only specific property of the Get-Service object, in this case Status Get-Service | GM #Let's talk this through this example once again Get-Service | Where-Object -Filter {$_.Status -eq 'running' } #We can use an alias Where instead of Where-Object Get-Service | Where {$_.Status -eq 'running' } #I can also link multiple comparissions together with -and -or Get-Service | Where {$_.Status -eq 'stopped' -and $_.Name -like 'w*' } ### What if I'd like to choose only specific properties Get-Service | Select-Object -Property DisplayName,Status # I can use alias Select instead Get-Service | Select DisplayName,Status # Also allows to access hidden by default properties # Let's find out the path of the program where it's running from, and when was it lunched Get-Process | Select * Get-Path | Select Name, Path, StartTime ### Always filter left |
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