How to add wiki page to the wiki page library in SharePoint using powershell

In this blog we will be seeing how to add wiki page to the wiki page library in SharePoint using powershell

  $listName="A"
  $siteURL="http://serverName:1111"
  $site=Get-SPSite $siteURL
  $web=$site.RootWeb
  $list=$web.Lists[$listName]               
  $rootFolder = $list.RootFolder
  $wikiPage = $rootFolder.Files.Add("/"+$rootFolder+"/Home.aspx", [Microsoft.SharePoint.SPTemplateFileType]::WikiPage)
  $wikiItem = $wikiPage.Item
  $wikiItem[[Microsoft.SharePoint.SPBuiltInFieldId]::WikiField] = "Template Preview" 
  $wikiItem.UpdateOverwriteVersion()