PowerShell: Assign permission to read-only users on the list on all site levels.

	#
	# Description:
	# List-Level Permission settings and assign "Contribute" role definition to the visitors group.
	# To allow read-only users to post, update, delete comments.
	#
	# Created Date:
	# v1.0 - 07-12-2017
	#
	# Author:
	# Vikas Bansal
	#
	Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
	$listName = "TestList"
	#get all webs (sub-sites) under site collection
	$WebsColl = Get-SPSite https://sp2013.com | Get-SPWeb -Limit ALL
	#iterate through each sub-site change list permissions
	foreach($web in $WebsColl) {
	$commentsList = $web.Lists.TryGetList($listName)
	if($commentsList -ne $null)
	{
	Write-Host $listName " exists on the" $web.Title at URL $web.Url -ForegroundColor DarkBlue -BackgroundColor Yellow
	# Assign the "Contribute" RoleDefinition to the site's visitors group
	$visitorsSPGroup = $commentsList.ParentWeb.AssociatedVisitorGroup #$spWeb.Groups[$visitorsSPGroupName]
	if(!$commentsList.HasUniqueRoleAssignments) {
	$commentsList.BreakRoleInheritance($true)
	}
	$assignment = New-Object Microsoft.SharePoint.SPRoleAssignment($visitorsSPGroup)
	$assignment.RoleDefinitionBindings.Add(($commentsList.ParentWeb.RoleDefinitions | Where-Object { $_.Type -eq "Contributor" }))
	$commentsList.RoleAssignments.Add($assignment)
	$commentsList.Update()
	Write-Host $listName " permission is changed for readonly users on the" $web.Title at URL $web.Url -ForegroundColor DarkGreen -BackgroundColor White
	}
	else
	{
	Write-Host $listName " not exists on the" $web.Title at URL $web.Url -ForegroundColor Yellow -BackgroundColor Red
	}
	}

view raw PowerShell_AssignPermissionToReadOnlyUsersOnList.ps1 hosted with ❤ by GitHub

PowerShell: Activate feature on all site levels.

	#
	# Description:
	# Activate the site feature on all sub-sites
	# This feature creates custom list
	#
	# Created Date:
	# v1.0 - 27-11-2017
	#
	# Author:
	# Vikas Bansal
	#
	Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
	#feature ID to create custom list
	$FeatureID="3e0d7f50-a6b7-45a6-b5a1-77950ef4327f"
	#get all webs (sub-sites) under site collection
	$WebsColl = Get-SPSite https://sp2013.com | Get-SPWeb -Limit ALL
	#get the Feature
	$Feature = Get-SPFeature -Limit All | Where { $_.ID -eq $FeatureID }
	#check if Feature exists
	if($Feature -ne $null) {
	Write-Host "feature exists" -ForegroundColor DarkBlue -BackgroundColor Yellow
	#iterate through through each sub-site activate the feature
	foreach($web in $WebsColl){
	#check if the Feature is activated
	if (Get-SPFeature -web $web.Url | Where {$_.ID -eq $FeatureId}) {
	Write-Host "feature is already activated on " $web.Url -ForegroundColor DarkBlue -BackgroundColor Yellow
	}
	else {
	Write-Host "feature not activated on " $web.Url -ForegroundColor Yellow -BackgroundColor Red
	#Activate the Feature
	Enable-SPFeature –identity $FeatureID -URL $web.URL -Confirm:$false
	Write-Host "feature is activated now on " $web.Url -ForegroundColor DarkBlue -BackgroundColor White
	}
	}
	}
	else {
	Write-Host "feature does not exists" -ForegroundColor Yellow -BackgroundColor Red
	}

view raw PowerShell_ActivateFeatureOnAllSiteLevels.ps1 hosted with ❤ by GitHub