Setup claims authentication through PowerShell

Following script updates the web application to use Claims based authentication:

$webApplicationUrl = "http://intranet"
$webapp= Get-SPWebApplication $webApplicationUrl
$webapp.UseClaimsAuthentication
$webapp.UseClaimsAuthentication=$True
$webapp.Update()
$webapp.ProvisionGl

PowerShell

If you would like a complete listing of the cmdlets:

Get-Command -module Microsoft.SharePoint.PowerShell | format-table name > textfilename.txt