How do I recycle an IIS App pool with Powershell?

Reference implementation of a Powershell script to recycle app pools, in response to Rick’s post:
http://www.west-wind.com/weblog/posts/2012/Oct/02/A-tiny-Utility-to-recycle-an-IIS-Application-Pool

#    File: RecycleAppPool.ps1
#    Author: Ralph Willgoss
#    Date: 2nd Oct 2012
#    Reference:
#    http://stackoverflow.com/questions/198623/how-do-i-recycle-an-iis-apppool-with-powershell
# =============================================================================
#    Iniatialise
=============================================================================
param ( )

=============================================================================
#   Main
=============================================================================

Write-OutPut ""
Write-OutPut "Starting Recycling App Pool"
Write-OutPut ""

$appPoolName = "AppPoolName" #$args[0]
$appPool = Get-WmiObject -namespace "root\MicrosoftIISv2" -class "IIsApplicationPool"
          | Where-Object { $_.Name -eq "W3SVC/APPPOOLS/$appPoolName" }
          
$appPool.Recycle()

Write-OutPut ""
Write-OutPut "Finished Recycling App Pool"
Write-OutPut ""

Alternatives:

# Windows 2003 & II6
C:\WINDOWS\system32>cscript.exe iisapp.vbs /a AppPoolName /r

# Windows 2008 IIS7
C:\WINDOWS\system32\inetsrv\appcmd recycle apppool "MyAppPool"

# cmdlet
Restart-WebAppPool

Restart-WebAppPool cmdlet

Originally posted on:
geekswithblogs.net c/o archive.org