Sometimes you may have a need to add a webpart to a page with powershell. The following code can be used to accomplish such a task. You can check out the following page for a list of webparts available in the Microsoft.SharePoint.WebPartPages namespace: http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.webpartpages.aspx

Here is the powershell code. Copy this into a PS1 file and then run from powershell using "./yourscriptname.ps1"

function main(){

[void][System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")
$url = "http://sp2010dev1/sites/test1"
$OpenWeb = Get-SPWeb $url
$OpenWeb
$OpenSite = Get-SPSite $url
$file = $OpenWeb.GetFile("http://sp2010dev1/sites/test1/SitePages/test1.aspx")
$WebPartManager = $file.GetLimitedWebPartManager([System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
Add-PageViewerWebPart "http://sp2010dev1/sites/test1" "http://sp2010dev1/sites/test1/SitePages/test1.aspx" "Body" 0 "SPCrew Site" "sp2010dev"
$OpenWeb.Dispose()
}

function Add-PageViewerWebPart($SiteURL, $pageUrl, $webpartzone, $index, $title, $content)

{
    $site = new-object Microsoft.SharePoint.SPSite($SiteURL)
    $web=$site.OpenWeb()
    $webpartmanager=$web.GetLimitedWebPartManager($pageUrl, [System.Web.UI.WebControls.WebParts.PersonalizationScope]::Shared)
    $webpart = new-object Microsoft.SharePoint.WebPartPages.PageViewerWebPart
    $webpart.ChromeType = [System.Web.UI.WebControls.WebParts.PartChromeType]::TitleOnly;
    $webpart.Title = $title

    $webpart.ContentLink = "http://www.spcrew.com";
    $webpartmanager.AddWebPart($webpart, $webpartzone, $index);    

    $web.Close()
    $site.Close()
}

function Get-SPSite([string]$url) {
    New-Object Microsoft.SharePoint.SPSite($url)
}

function Get-SPWeb([string]$url) {
    $SPSite = Get-SPSite $url
    return $SPSite.OpenWeb()
    $SPSite.Dispose()
}

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