Delete permissions from site with powershell

Question

I know how to delete permissions from lists and document libraries. Simply I can use the BreakRoleInheritance, and I can remove every user. But I couldn't find a way to do this with a site.

Like this: $site =new-object Microsoft.SharePoint.SPSite (http://spt/spaces/thisisit)

$site doesn't have inheritance method (or I just don't know how to use it).

So how can I delete every permission on a site? Not on the lists, not on the document libraries, but on the site itself?

Answer 1

You need to get the web object of the site to break the inheritance:

$web = Get-SPWeb -Identity $Url
$web.BreakRoleInheritance($True)

UPDATE

If you want to delete permission levels in root web, you can do it this way:

$web = Get-SPWeb -Identity http://sp2010:90
$PermissionLevel=$web.RoleDefinitions
$PermissionLevel.Delete("Contribute")